Systems working together The Human Body

Humans Have Systems For:  Movement/Support/Protection  Digestion  Circulation  Respiration  Excretion (Waste Removal)  Control and Coordination  Reproduction  Protection from disease

These systems interact to keep an organism working properly and help maintain homeostasis

Movement  The skeletal system and muscular system work together so humans can move  Why is movement important?  escaping danger  obtaining food and shelter  reproduction

The Skeletal System Also…  Provides protection for the internal organs

And…  Inside of the bone is bone marrow which is where blood cells are produced

Human Muscular System

More About Muscles…  There are different types of muscles  Skeletal muscle is voluntary (under conscious control) and moves the bones  Smooth muscle is involuntary (under unconscious control) and is found in places like the digestive tract and lines blood vessels  Cardiac muscle is involuntary and is found in the heart

Check Out The terminator’s muscular/skeletal system

Digestion  For the mechanical (chewing) and the chemical breakdown (enzymes) of food  This is necessary so that food can be absorbed into the body and transported to all cells

Mouth Salivary gland Esophagus Stomach Pancreas Small intestine Large intestine Gall bladder Liver Anus

Circulatory System  Moves substances to and from cells  This system is necessary to supply needed materials to the cells and remove cell products and wastes

Respiratory System  For gas exchange  Supplies oxygen to the body and removes carbon dioxide  This system is necessary so that cells can use the oxygen to release the energy use the oxygen to release the energy stored

Excretory System  Gets rid of all body waste products  Removes excess heat energy  This system is necessary because of the build up of waste products and poisons in the cells

Don’t forget, these are also part of the excretory system!

Control and coordination  The nervous and endocrine systems interact to control and coordinate the body’s response to internal and external changes  The response to stimuli

The Nervous System  The central nervous system (CNS) is your brain (central control) and spinal cord (links the brain to other parts of the body)  Other nerves provide the pathways to muscles, glands and sense organs

The Endocrine System Regulates growth development and reproduction through glands Regulates growth development and reproduction through glands Glands produce hormones – chemical messengers that affect other parts of the body Glands produce hormones – chemical messengers that affect other parts of the body