1. Human Body Systems and Functions

2. Skeletal
Serves as the anchor for all the body’s movements
Provides support
Protects soft organs inside the body
Muscular
Provide movement
Maintain body temperature
Maintain posture
Digestive
Absorb nutrients
Absorb water
Remove waste

3. Respiratory Urinary Circulatory Immune
To get oxygen from the environment
Remove carbon dioxide and other waste
Urinary
To filter liquid waste from the blood
Circulatory
Deliver oxygen to the body
Immune
Defends against pathogens and disease

4. Integumentary Endocrine Nervous Repels water Guards against disease
Helps maintain homeostasis
Senses the environment
Endocrine
To control the conditions in your body by making and sending chemicals from one part to another.
Nervous
Detects and interprets information
Controls most of the body’s functions

5. Sample question Which function summarizes the excretory system?
A. It removes waste
B. It collects oxygen
C. It attacks diseases
D. It delivers nutrients

6. Human Body Systems Organs

7. Skeletal Muscular Bones Cardiac Muscles – The Heart - Involuntary
Smooth Muscles – Digestive - Involuntary
Skeletal Muscles – Voluntary
Cartilage – cushion between your bones that acts as a shock absorber
Tendons- attaches muscle to bone
Ligaments- attaches bone to bone

8. Digestive Salivary Glands – moisten foods and enzymes break down food.
Esophagus – carries food from the throat to the stomach through peristalsis.
Stomach – mix and mash food particles
Small Intestine – nutrients are absorbed into the bloodstream.
Large Intestine - absorbs water and some other nutrients
Pancreas – to regulate glucose in the bloodstream
Liver – secretes bile for digestion and removes toxins from the blood.
Gall Bladder – stores bile
Rectum – eliminates waste from the body

9. Respiratory
Nose – allows oxygen to enter the body
Trachea – connects the throat to the bronchial tubes
Larynx/Voice Box – helps with breathing and sound production
Lungs – responsible for breathing in oxygen and exhaling out CO2
Bronchial Tubes – branches which connect the trachea to the lungs
Alveoli – tiny sacs (1-cell thick) at the end of the bronchial tubes which exchange oxygen and carbon dioxide within the blood
Ribs – encloses the thoracic cavity
Diaphragm – a large muscle that stretches across the floor of the thoracic cavity

10. Urinary
Kidneys – filter blood
Ureters – tubes which carry waste from the kidneys to the bladder
Bladder – sac that store liquid waste and has a wall of smooth muscle
Urethra – tube that carries liquid waste outside of the body
Circulatory
Heart – pumps oxygen-poor blood to the lungs and oxygen-rich blood to all parts of the body.
Veins – blood vessels that carry blood toward the heart
Arteries – blood vessels that carry blood away from the heart
Capillaries – tiny blood vessels that connect arteries with veins

11. Immune
1. Lymph Nodes – acts as a filter or traps foreign particles
2. Spleen – remove old red blood cells and stores blood
Integumentary
Skin
Epidermis – outer layer of skin
Dermis – inner layer of skin
Hair
Nails

12. Endocrine
Thyroid – Necessary for metabolism
Pancreas – regulates glucose
Adrenal Gland – regulates carbohydrates, proteins, fats, metabolism, water and salt levels
Nervous
Central Nervous System
a. Brain
b. Spinal Cord
2. Peripheral Nervous System
a. Sensory Nerves
b. Motor Nerves
3. Autonomic Nervous System – involuntary (heart, stomach)
4. Voluntary Nervous System – voluntary (skeletal muscles)

13. Interactions

14. Skeletal Muscular Digestive Bone Marrow- makes red blood (circulatory)
Rib Cage- protects lungs and heart (respiratory and circulatory)
Muscular – attaches muscles to bones
Muscular
Skeletal – attaches muscles to bones
Circulatory – brings nutrients to the muscles
Digestive – stomach and esophagus (smooth muscles)
Digestive
Endocrine – pancreas
Circulatory – nutrients absorbed in the blood stream
Muscular – stomach and esophagus (smooth muscles)

15. Respiratory
Circulatory- receives oxygen from the red blood cells
Nervous – controls breathing
Immune – foreign particles in the lungs trigger the immune system to remove particles
Urinary
Endocrine – adrenal glands release chemical to allow kidneys to regulate fluids in the body
Circulatory - blood is cleansed and liquid waste is removed
Muscular – regulate and release urine

16. Circulatory
Muscular – blood brings nutrients and oxygen to the muscles
Digestive – nutrients in the small intestine are absorbed in the bloodstream
Respiratory – oxygen and carbon dioxide are exchanged from the blood to the alveoli in the lungs
Immune
1. Respiratory - foreign particles in the lungs trigger the immune system to remove particles
2. Skeletal – immune cells are found in bone marrow
3. Digestive – appendix and tonsils help decide what is food or pathogens

17. Nervous Muscular – your brain tell your muscles to move
Digestive - triggers the start of digestion and release of many hormones and enzymes throughout your body.
Endocrine – your brain decides when hormones are created

18. Sample question
How do the respiratory and circulatory systems work together?
A. The respiratory system takes in carbon dioxide, while the circulatory system delivers carbon dioxide to the cells
B. The circulatory system takes in carbon dioxide, while the respiratory system delivers carbon dioxide to the cells
C. The respiratory system takes in oxygen, while the circulatory system delivers oxygen to the cells
D. The circulatory system takes in oxygen, while the respiratory system delivers oxygen to the cells