Human Body Systems

7.12 B Identify the main functions of the systems of the human organism, including the

circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive,

integumentary, nervous, and endocrine systems.

Structure: What are the parts?Joints and bones

Skeletal System

Function: What is its job? body and its muscles, contains materials to make new blood cells.

Structure: What are the parts? 3 types of muscle: skeletal, smooth, and cardiac; ligaments and tendons

Muscular System

Function: What is its job? Allows the body to move when attached to bone, allows movement in internal organs such as the heart and intestines, provides strength, balance and warmth.

Structure: What are the parts?Mouth, esophagus, stomach, small and large intestines, anus

Digestive System

Function: What is its job? Converts food into simpler substances for the body to absorb as nutrients, breakdown of food also provides energy for all body functions.

Structure: What are the parts?Includes heart, arteries (distribute to body) and veins (carry deoxygenated blood to heart)

Circulatory Systems

Function: What is its job? Circulates blood through the body, supplies cells with oxygen and nutrients, removes waste products.

Structure: What are the parts?Airways such as trachea, lungs, and alveoli

Respiratory System

Function: What is its job? Supplies blood with oxygen in the lungs, and removes carbon dioxide.

Structure: What are the parts?Kidneys, bladder

Excretory

Function: What is its job? Filters water and fluids from the blood while also collecting urine waste.

Structure: What are the parts?Skin, hair, nails, and sweat glands

Integumentary System

Function: What is its job? Continuously receives communication with the external environment (temp, humidity) and protects body deeper tissues, excretes waste. Helps rid body of heat, synthesizes Vitamin D.

Structure: What are the parts?Brain, spinal cord, and nerves.

Nervous System

Function: What is its job? Sends immediate and specific info as electrical impulses, control center coordinating all actions and reactions work together and are the bodies 2 systems for control and communication.

Structure: What are the parts?Glands, hormones

Endocrine System

Function: What is its job? Sends signals in form of hormones to the body but more slowly than nervous system, controls growth, reproduction, and metabolism.

Structure: What are the parts?Lymph nodes, tonsils, spleen

Immune System

Function: What is its job? Responds to pathogens and provides defense to the body’s systems from disease caused by viruses and bacteria.

Structure: What are the parts?Females: Uterus, ovariesMales: Penis, testicles

Reproductive System

Function: What is its job?Allows humans to continue as a species by fertilizing a female ovum with a male sperm through sexual reproduction.