2) which of the quadriceps crosses two joints? what are it’s actions?

Rectus Femoris

Explanation:

It has an action of extending the knee from a seated position.

I hope this helps, and as always, I am joyous to assist anyone at any time.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey