Muscular System By: Yusra, Zaneerah, Aziz

Muscular System Basics

You have around 640 muscles in your body! They have a lot of functions. Most of your muscles are controlled by you, but a muscle like the heart is something that works independently without you even thinking about it.

The Human Heart

Muscles are made up of a type of elastic tissue (sort of like the material in a rubber band). Thousands, or even tens of thousands, of small fibers make up each muscle.

Muscle Fibers

Primary Purpose

Muscles are a special type of tissues of the human body that possess the ability of contraction and relaxation. They can contract actively thus producing force for different body movements.

Muscles are helping this gymnast move

Muscle Type

There are three types of muscles in your body

Skeletal Muscle: Moves bones, maintains posture, maintains body temperature.

Structure of Skeletal Muscle

Smooth Muscle: Moves internal organs such as intestines.

Smooth Muscle in small intestine

Cardiac Muscle: Pumps blood through the body

Cardiac muscle cells in the heart

Basic Interaction With Another System

How the Muscular System interacts with the Skeletal System

The skeletal system is covered with muscles that enable us to move. These muscles are attached to the bones through tendons and often stretch from one end of the bone to the other. As the fiber in the muscle contract, they shorten and pull the tendon. The tendon, in turn, pulls the bone and makes it move.

Skeletal muscle contract by shortening and pulling the tendon
Muscle fibers can return to their original length after being shortened

Interactions With Other Systems

How the Muscular System interacts with the Nervous System

The nervous system is the thing that actually sends the signals from the brain for the muscles to move.

This shows how the brain sends signals via nervous system to tell the muscle to move

How the Muscular System interacts with the Digestive System

The smooth muscles line the digestive system to help the broken down food move through the body.

This shows how the muscular system helps the food do into the stomach

How the Muscular System interacts with the Circulatory System

The cardiac muscle helps to move the blood around the body, working together with the circulatory system.

This shows that when muscles contract the valve opens which helps the blood move




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Yusra Haroon

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