Muscles

Science 6 Muscular System

Skeletal Muscle

Skeletal muscle is the only voluntary muscle tissue in the human body—it is controlled consciously. Every physical action that a person consciously performs (e.g. speaking, walking, or writing) requires skeletal muscle. The function of skeletal muscle is to contract to move parts of the body closer to the bone that the muscle is attached to. Most skeletal muscles are attached to two bones across a joint, so the muscle serves to move parts of those bones closer to each other.

Multiple Choice

How many muscles in your body?

• 100

• 200

• 400

• 600

Multiple Choice

Three types of muscles

• skeletal, ,muscular, cardiac

• skeletal, visceral, cardiac

Multiple Choice

It is also called involuntary muscles.

• smooth

• skeletal

• cardiac

Multiple Choice

The muscle that make up the heart

• skeletal

• cardiac

• smooth

Multiple Choice

They are voluntary muscles.

• cardiac

• skeletal

• visceral

Multiple Choice

Skeletal muscles are held to the bones with the help of

• heart

• ligaments

• tendons

Multiple Choice

The muscles help you move your shoulders every which way — from swinging a softball bat to shrugging your shoulders

• deltoid

• pectoralis

• bicep

Multiple Choice

What will happen to the muscles when you bend your arm?

• Biceps contracts and triceps relax

• Biceps relax and triceps contracts

• Biceps and triceps relax

• Biceps and triceps contracts

Multiple Choice

Food that keeps the muscles health. Which is not?

• Fatty foods

• Whole grain

• lean protein

• fruits and vegetables

Multiple Choice

Food that keeps the muscles health. Which is not?

• Fatty foods

• Whole grain

• lean protein

• fruits and vegetables

Multiple Choice

They are voluntary muscles.

• cardiac

• skeletal

• visceral

Open Ended

What do call the combination of the muscular and skeletal systems working together in our body?

Open Ended

What are the components that make up the skeletal system?

Open Ended

It provides the structural framework for the body and protects internal organs such as the heart, lungs and brain.

Open Ended

-includes all the bones of the head, neck, chest and back.

Open Ended

-includes the bones of the shoulder,arms,hands ,hips,and feet

The muscular system

is responsible for the movement of the human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person’s body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found inside of the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body

There are three types of muscle tissue:

 Visceral, cardiac, and skeletal.

Visceral Muscle

Visceral muscle is found inside of organs like the stomach, intestines, and blood vessels.

Visceral Muscle

The weakest of all muscle tissues, visceral muscle makes organs contract to move substances through the organ. Because visceral muscle is controlled by the unconscious part of the brain, it is known as involuntary muscle—it cannot be directly controlled by the conscious mind. The term “smooth muscle” is often used to describe visceral muscle because it has a very smooth, uniform appearance when viewed under a microscope. 

Cardiac Muscle

Found only in the heart, cardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that stimulates other cardiac muscle cells to contract. Because of its self-stimulation, cardiac muscle is considered to be autorhythmic or intrinsically controlled.