Basic Human Anatomy: Muscular Systems

Question 1

the three muscle types:

Answer 1

Skeletal, Smooth and Cardiac. These three types make up all the muscles in the body

Question 2

What are the Cardiac mussle cells

Answer 2

The cardiac muscle cells are very specialized and make up the heart. They have a couple of unique functions that you will learn a lot more about in course two. Most important to remember right now is that the heart is a muscle, it’s just highly specialized and works a little differently than say our arm.

Question 3

What is the smooth muscles and what kind of muscle are they

Answer 3

The smooth muscles are found in a lot of places including the intestines and the blood vessels. The smooth muscles are also called involuntary muscles, can you flex your small intestine for me real quick? I didn’t think so. These are smooth muscles and don’t rely on us thinking about them to do their job. This is great news because it means you don’t have to spend your day thinking about moving your food from your stomach through your intestines.

Question 4

What are the skeletal muscles and what kind of muscle are they

Answer 4

These muscles are also known as the voluntary muscles because we, for the most part, control what they do.

Question 5

What are muscles

Answer 5

Muscles are made up of bundles of fibers that contract and relax through a series of complex chemical reactions at the level of the cell.

Question 6

Are there many different muscles on the face

Answer 6

There are lots of muscles of the face, just think about all the different facial expressions you can make. Each of those requires a unique combination of muscles contracting and relaxing. Some muscles in the face we will highlight are the orbital muscles that actually sit inside the orbital space

Question 7

Another muscle and one of the biggest muscles of the face is the masseter muscle.

Answer 7

This is the one that helps you chew.

Question 8

In your neck, the muscles do a lot to help protect your spine. One of the most easy to identify is the sternocleidomastoid

Answer 8

You can see it here on me too but it attaches to the medial aspect of the clavicle and does a lot of work turning your head.

Question 9

Moving into the chest, you might remember that the spaces in between the ribs were called the intercostal space. Well, the muscles between the ribs is called the

Answer 9

intercostal muscle

Question 10

What does the intercostal muscle do

Answer 10

These muscles, when they contract like when you take a deep breath in, make the space inside the chest bigger and help you draw air into your lungs.

Question 11

Paraspinal muscles

Answer 11

Other muscles of the thorax we will highlight are on the posterior and include the paraspinal muscles which run alongside the spine and are actually found along the entire spine and from the cervical through the lumbar spine.

Question 12

muscles and shoulder joint

Answer 12

There are also a lot of muscles that attach to various parts in the shoulder joint and through their coordination of contracting and relaxing, create all the different movements that we have in the shoulder.

Question 13

Bones in the abdomen

Answer 13

We mentioned before there aren’t a lot of bones in the abdomen.

Question 14

What are the few muscles in the abdomen

Answer 14

In exchange, there are some large strong muscles that help protect the internal organs

Question 15

In exchange, there are some large strong muscles that help protect the internal organs. The ones most anterior or called the rectus abdominis and form the entire interior surface of the abdomen. What does it do

Answer 15

These are the ones that contract when you do a set-up.

Question 16

The obliques

Answer 16

The obliques are the muscles found laterally or along the side.

Question 17

There are lots of muscles in the pelvis as well but we will not actually spend much time on the muscles here.

Answer 17

The muscles that connected the pubic rami, remember those? With the sacrum, are the ones that form the floor of the pelvis and protect the intestines and pelvic organs such as the bladder or uterus.

Question 18

What do the gluteal muscles do

Answer 18

The gluteal muscles are the muscles that make up your buttocks These are some of the strongest muscles in the body and primarily work to move the legs at the hip.

Question 19

deltoid

Answer 19

Your deltoid contracts and allow your arms to abduct.

Question 20

What are the muscles of the upper arm

Answer 20

The biceps and triceps are the muscles of your upper arm.

Question 21

What do the biceps do

Answer 21

The biceps contract to flex at your elbow.

Question 22

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What do triceps do

Answer 22

Your triceps are the partner muscles and when they contract, they extend your arm at the elbow.

Question 23

When there are pairs of muscles like the biceps and triceps, that do opposite things, they’re termed

Answer 23

antagonistic muscle groups

Question 24

muscles in wrist and hands

Answer 24

Don’t get into the weeds with the smaller muscles of the wrist and hand, there are a lot of them and because of their coordinated contraction, you can perform complex tasks like play the piano or pick up a fork.

Question 25

quadriceps

Answer 25

The quadriceps also contract and cause extension but that is extension at the knee.

Question 26

hamstring

Answer 26

The hamstrings are the antagonistic muscle group to the quadriceps and cause flexion of the knee.

Question 27

gastrocnemius

Answer 27

Lower down in the leg is your calf or your gastrocnemius. This is the large muscle on the back of your lower leg. When it contracts, it extends your foot.

Question 28

What does the tendon attach to

Answer 28

The tendon that attaches to your heel is called the achilles tendon. Reach down and feel it. It's just above your heel and is a thick cord that runs just posterior to your ankle bone.