Answer:
Tendon sheaths <u>act as friction-reducing structures.</u>
Explanation:
Tendon sheaths are fibrous tissue that is around tendons to protect and make the movements of these smoother. For example, they reduce the friction of the flexors and extensors tendons of the hand. These are tendons that we constantly use to open and close our hands when we want to grab objects. Without the sheath, the tendons will not move easily, and due to the excessive use, there can be inflammation.
The sheats have two layers, one internal, which is a synovial one that produces synovial fluid to lubricate the tendon, and the external, which is a fibrous layer.
I don't think the answer is A as that seems a bit drastic, I think it's C.
Answer:
Organ is made up of cells and tissues that perform larger functions.
Explanation:
Number 3 is the plants take in carbon dioxide and release oxygen so that we can breathe and the use the carbon