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natita [175]
2 years ago
5

There are three major types of cells in the lymphoid tissues of the body. One category, the ____________, contains immunocompete

nt cells that are able to destroy or immobilize foreign substances in the body; these foreign substances are called ____________. The two varieties in this group are ______________ and _____________. The other class of protective cells are called _______________. These defend the body by engulfing, or ______________, foreign substances. The third cellular group are the _____________, fibroblast-like cells that form the stroma or framework of the lymphoid organs. Lymphoid tissue is specifically classified as a type of connective tissue called ____________. When lymphoid tissue is loosely packed, it is called ______________; when it is tightly packed into spherical masses, the arrangement is said to be ________________.

Biology
1 answer:
KonstantinChe [14]2 years ago
5 0

Answer:

See the picture attached

Explanation:

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The design of the amphibian circulatory system is curious because blood accumulates oxygen in the lungs and is then returned to the heart before being pumped into the rest of the circulatory system. Therefore, a mixing between oxygenated and deoxygenated blood occurs as blood returning to the heart from the lungs is mixed with incoming blood from the body. Frogs handle this situation by having a very slow metabolism and by absorbing some oxygen through their skin. In addition, the ventricle does have some directional control over the distribution of the blood.

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