Body Organization and Systems Overview

Cells

• Cells make up all living things.• There are different types in your

body, and they are the basic units of structure and function.

Tissues

• Cells make up tissues, and there are 4 main types

1. Epithelial Tissue2. Connective Tissue3. Muscle Tissue4. Nerve Tissue

Epithelial Tissue

• Function – lining inside and outside of the body

• Examples: skin, organs, mouth

Connective Tissue

• Function: Provides support and structure• Examples: tendons, ligaments, cartilage,

bone, fat

Muscle Tissue

• Function: Movement, can contract• Examples: All muscles

Nerve Tissue

• Function: Conducts signals• Examples: glial cells and neurons

Organs

• Tissues are grouped together to make Organs.• Organs are made of at least 2 different types

of tissue that work together for a common purpose.

Organ Examples

• Heart

• Lungs

• Stomach

• Liver

Organ Examples

• Kidney

• Brain

• Small Intestine

• Large Intestine

Organ Examples

• Urinary Bladder

• Pancreas

• Spleen

• Gall Bladder

Skin

• And of course the largest organ in the body, the skin!

Organs (fill in the letters on your paper)

A. Brain B. HeartC. Large IntestineD. Small IntestineE. Stomach F. KidneyG. LiverH. PancreasI. Gall Bladder

A

B

CD

EF

GH

I

Organs

1

2

3

4

678

9

Systems

• Two or more organs that work together to perform a specific functions make up different organ systems that make up your body.

Systems Examples

• Digestive• Excretory• Musculoskeletal• Circulatory• Respiratory

• Integumentary• Endocrine• Nervous• Reproductive• Lymphatic

No system works by itself. They overlap and help each other and control each one another to make your body run smoothly. In a sense, they make up one big factory (YOUR BODY!!!).

Digestive System

• Functions: To break down the food we eat and absorb the nutrients in our food.

Excretory System

• Function: To rid the body of wastes.

Musculoskeletal System

• Function: To give the body structure, support, and movement.

Circulatory System

• Function: To transport nutrients, gases, hormones, and wastes throughout the body.

Respiratory System

• Function: To exchange gases between the body and blood and the environment.

Integumentary System

• Function: To protect the inside of the body and maintain homeostasis (a stable internal environment – temperature, pH, etc.).

Endocrine System

• Function: To relay chemical messages throughout the body mainly in the form of hormones.

Nervous System

• Function: To relay electrical messages throughout the body that often control other organs and systems.

Reproductive System

• Function: To make gametes that can form a new organism at fertilization.

Lymphatic System

• Function: To remove excess fluids and destroy internal invaders (bacteria and viruses).

Embed Quiz