Besides the enumerated objects, other objects were tied to the tabernacle:  these were more or less the highpriest, the priests, the servants, the special garments and undergarments of the priests and the highpriest some of which had various types of ornaments, the lamps, the cups, bowls, pitchers, the physical structure of the tabernacle, the tent cloth, and its courtyard.  These will not be mentioned further.

It is worth noting that the sacrificial altar is situated in the courtyard outside the temple · tabernacle proper; this was no accident and was prophetic in nature.  At the bottom, under the subheading altar of burtn offering, Paul explains about that briefly.

Ark of the Covenant

When considering worship, why would the Most Holy contain the Ark of the Covenant?  This was the only object in the room apart from its physical structure and the lamps. (?)  What did that symbolize?

Doesn't it seem strange that the high priest only entered this room once a year to sprinkle blood on the Ark of the Covenant?  Not only was blood a must, but incense prevented the high priest's death just as the bells on his garments did!

Hebrews 9:6-7, Now these things being thus ordered, into the first tabernacle the priests enter at all times, accomplishing the services; 7but into the second, the high priest only, once a year, not without blood, which he offers for himself and for the errors of the people: (Darby)

Leviticus 16:13-14 13And he shall put the incense on the fire before the Lord, and the smoke of the incense shall cover the mercy seat over the tables of testimony, and he shall not die. 14And he shall take of the blood of the calf, and sprinkle with his finger on the mercy seat eastward: before the mercy seat shall he sprinkle seven times of the blood with his finger. (AB)

The bells on the priestly garment demonstrated God's continual presence to the high priest since not sounding a warning prior to entering the Most Holy would cost the person's life by divine hand.  As such. the edict of bells strongly emphasized that this was no mere church function to be casually  performed – it was serious business. 

The incense was symbolic of Jesus' prayers to God that reached into the most holy even when he was on earth, here too life was at stake.  This same symbolism is also used in regard to the prayers of the Saints.  From this, Christians should take to heart how important prayers are!

Psalm 141:2, Let my prayer be set forth before thee as incense, the lifting up of my hands as the evening oblation. (Darby)

The sprinkling of blood once a year upon the ark of testimony demonstrates how Christ's ransom functions.  It is not a simple belief in his ransom that saves.  No!  Instead we read:

Hebrews 9:19-22, For, when every commandment according to the law had been spoken by Moses unto all the people, taking the blood of the calves and the goats, with water and scarlet wool and hyssop, both, the scroll itself, and all the people, he sprinkled; 20Saying—This, is the blood of the covenant which, God, hath sent in command unto you: 21Yea, the tent also, and all the utensils of the public ministry, with blood, in like manner, he sprinkled: 22And, nearly, all things, with blood, are purified, according to the law, and, apart from blood-shedding, cometh no remission. (Rotherham)

As seen, blood consecrates the covenant between God and men; likewise, Christ's blood, his sacrifice presented before God in the Most Holy, in heaven, consecrated the New Covenant for remission of sins.  Baptism enters the person of faith into the covenant relationship with God who accepts that person's baptism as an expression, as works, of faith that requests by Christ's blood forgiveness from God. 

From that point on, through the redeeming value of Christ's blood, God counts the sinner righteous, as having died with respect to sin and as living with respect to Christ.

Perhaps now, we can understand why the Ark of the Covenant was the sole object present in the Most Holy that were to be sprinkled with the blood of the covenant that caused forgiveness of sins.  The exact same thing happened in the fulfilment when Christ died a sacrificial lamb and presented as high priest the blood of the new covenant to God in heaven.

Basin or Laver for washing

Little needs to be said about this. 

Exodus 30:17-21, And the Lord spoke to Moses, saying: 18Thou shalt make also a brazen laver with its foot, to wash in: and thou shalt set it between the tabernacle of the testimony and the altar. And water being put into it, 19 Aaron and his sons shall wash their hands and feet in it: 20When they are going into the tabernacle of the testimony, and when they are to come to the altar, to offer on it incense to the Lord, 21Lest perhaps they die. It shall be an everlasting law to him, and to his seed by successions. (DRC)

God insists on cleanliness, indeed on holiness, on penalty of death in regards to those approaching and coming before him. 

Isaiah 1:15-20, And when ye spread forth your hands, I will hide mine eyes from you; yea, when ye make many prayers, I will not hear: your hands are full of blood.  16 Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil; 17 learn to do well; seek justice, relieve the oppressed, judge the fatherless, plead for the widow. 18Come now, and let us reason together, saith Jehovah: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool. 19If ye be willing and obedient, ye shall eat the good of the land: 20but if ye refuse and rebel, ye shall be devoured with the sword; for the mouth of Jehovah hath spoken it. (ASV)

Isaiah  4:4, when the Lord shall have washed away the filth of the daughters of Zion, and shall have purged the blood of Jerusalem from the midst thereof, by the spirit of justice, and by the spirit of burning. 5And Jehovah will create over the whole habitation of mount Zion, and over her assemblies, a cloud and smoke by day, and the shining of a flaming fire by night; for over all the glory shall be spread  a covering. (ASV)

Only those who are holy in conduct can approach God and become appointed so as to become Saints.  These must be holy in conduct; they must have washed themselves clean in the blood of Christ and by water baptism. 

I Peter 1:15, but like as he who called you is holy, be ye yourselves also holy in all manner of living; 16because it is written, Ye shall be holy; for I am holy. (ASV)

The scripture in Isaiah 4:4 indicates how each Saint must be cleansed from his impurities.  This the Lord Jesus, the Refiner, shall do in the furnace of affliction.   About this process, more is said elsewhere.  When all the Saints have been collected – that is many have been called but have been disapproved, and few have made it through the furnace of affliction – then it is time for the kingdom to begin its operation.

Altar of burnt offering

The subject is somewhat evasive.  Some may have a difficult time agreeing with the conclusion, in which case I caution meditation and research into the subject.  As it happens, remember that there are two altars; this actually assists us in determining what is what.  When studying the altar of incense, it becomes apparent that it is not the altar, but the highly pleasant smoke of incense that God wanted.  The altar then in the Christian application becomes the means by which sacrifices are made to God.

In regard to the altar of burnt offering, the similarity cannot be escaped.  It is what is sacrificed that had importance and took our sin away– namely, our sin offering, Jesus Christ.  What then does the altar signify?

Naturally, the altar came before the sin offering put on it.  A cryptic statement by Paul refers to this altar:

Hebrews 13:8-15, We have an altar from which they have no right to eat, those officiating at the tabernacle. 11For of the beasts whose blood is brought into the holy things for sin by the high priest, the bodies of these are burned outside the camp. 12Therefore Jesus also, so that he might sanctify the people through his own blood, suffered outside the gate. 13Let us therefore go forth to him outside the camp, bearing his reproach. 14For here we have no enduring city, but we seek that which is coming. 15Through him therefore, let us offer up a sacrifice of praise to God continually, that is, fruit of lips acknowledging his name. (AVC)

(A) In this scripture, it appears that Christ himself is the means by which Christians offer up praise to God.  In that sense, Christ becomes the Christian's means by which he offers up acceptable fruit of lips to God continually.  In the case of Christians then, Christ is their altar of burnt offering.

How about Christ himself?  Most certainly, he cannot be his own altar!  Again, Paul comes to our aid.

Hebrews 10:5-10, Therefore when he comes into the world, he says, Sacrifice and offering thou did not desire, but thou prepared for me a body. 6In whole burnt offerings, and for sin thou were not pleased. 7Then I said, Lo, I come (in the volume of a book it is written about me) to do thy will, O God, 8saying above, Sacrifice and offering and whole burnt offerings and for sin thou did not desire, nor were thou pleased with things that are offered according to the law. 9Then he said, Lo, I come to do thy will, O God. He takes away the first, so that he may establish the second. 10By which will we are sanctified through the one time offering of the body of Jesus Christ. (ACV)

(B) In this manner, Paul sheds a single beacon of light on the subject.  The means by which Jesus was sacrificed was by God's will.  In Jesus' case then the Father's divine will becomes the altar of burnt offering on which the sacrifice was offered, so that we, as it says, "are sanctified through the one time offering of the body of Jesus Christ."

Interpretation

Revelation contains symbolic depictions about occurrences pertaining to the altar.  Logic and years of study guide me, but does not assure 100% accurate interpretation.  Thus each may accept or reject the following according to their own desires:

Revelation contains the following scripture:

6:9,10, And when he opened the fifth seal, I saw underneath the altar the souls of those who had been killed because of the word of God, and because of the testimony of the Lamb that they held. 10And they cried out in a great voice, saying, Master, Holy and True, how long do thou not judge and avenge our blood from those who dwell on the earth?  (ACV)

Since dead souls are dead and are no longer (see condition of the dead), the symbolism here should be as follows:  the fact that these souls are beneath the altar indicates that they are in an approved condition by means of the ransom that was sacrificed on this altar, but they have not received their reward yet. 

Verse ten demonstrates the intend of God to be the avenger against all notorious deeds, particularly those committed against the brethren of Christ.

8:5, And the agent who took the censer, also filled it from the fire of the altar, and cast it to the earth. And there occurred thunders, and voices, and lightnings, and an earthquake. (ACV)

Fire is both a destructive and cleansing agent.  Obviously, the earth is going to suffer the avenging, the cleansing effect, of God's wrath.

16:7And I heard the altar saying, Yea, Lord God Almighty, true and righteous are thy judgments.  (ACV)

Perhaps in this instance, the altar depicts, as in the first symbolic application, Christ Jesus who here pronounces Jehovah God's virtues and righteous judgments.