3. we have about in our body. 4. most of them are cobtrolled with of muscles.
5. help hold bones together.
6. help anchor muscles to the bones.
7. without bones become soft enough to .
8.your bones and muscles are .
9.sharks don't have any , they are all cartilage.
10.where do you have cartilage in your body?

i don't know. if i were you, i would search it up online : d

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.