YOU CAN SOMEONE HELP, ILL GIVE BRAINLIEST

Vas happenin!!
1)

Vastus lateralis: On the outside of the thigh, this is the largest of the quadriceps. It extends from the top of the femur to the kneecap, or patella.

Vastus medialis: This teardrop-shaped muscle of the inner thigh attaches along the femur and down to the inner border of the kneecap.

Vastus intermedius: Between the vastus medialis and the vastus lateralis at the front of the femur, it is the deepest of the quadriceps muscles.

Rectus femoris: This muscle attaches to the kneecap. Of the quadriceps muscles, it has the least affect on flexion of the knee.

2)

I don’t know what graph it is so I am going to take an educated guess. I think they are cardiac muscles because in the diagram shows the muscles around the chest area. This is voluntary movement

3)

The muscles involved in the flexion movement include the anterior deltoid

4)

Muscles serve several purposes in your body. Your muscles contract for any number of reasons, but they primarily do the following.

Offer stability to your joints and connective tissues – Your muscles lengthen and shorten, sometimes involuntarily, as your body needs them.
Produce heat to maintain your body temperature – Around 40% of your body’s temperature converts into muscle work. Shivering is your body’s response to feeling cold, and your skeletal muscles activate to warm your body.‌
Maintain posture – Muscles help you maintain a position like sitting or standing. ‌