1. Endocrine System Skeletal System
Structures
Pancreas
Adrenal Glands
Thyroid
Hormones
Hypothalamus
Pituitary
Thymus
Adrenal
Ovaries
Testes
Interacting Systems
Regulation:
Endocrine system makes certain hormones.
Blood in the Circulatory system carries them to the skeletal system to control the amount of calcium released by bones.
Skeletal System
Structures
Nutrient Absorption
Clavicle
Femur
Humerus
Phalanges
Skull
Spine
Bones
Cartilage
Ligaments
Interacting Systems
Works with the muscular system to move the body.
Works with the immune system to produce white blood cells.
Produces red blood cells for the circulatory system.
Function
Influences growth, development, and metabolism
Helps maintain homeostasis
Function
Supports and protects vital organs
Allows movement
Stores minerals
Serves as the site for red blood cell production

2. Muscular System Immune System Structures Skeletal Muscle Smooth Muscle
Cardiac Muscle
Tendons
Interacting Systems
Food is broken down in the stomach mechanically by the muscular system and chemically by water, acid, and enzymes in the digestive system. Nutrients are then absorbed by blood in the circulatory system.
Immune System
Structures
Physical, chemical, and biological barriers or active defense mechanisms
White blood cells
T-Cells
B-cells
Macrophages
Interacting Systems
Mucus in the lungs traps a virus in the respiratory system.
T-cells in the immune system destroy virus-infected cells.
Nerves in the nervous system sense the need to cough.
Function
Protects against disease.
Stores and generates white blood cells
Function
Produces voluntary and involuntary movements
Helps to circulate blood and move food through the digestive system

3. Nervous System Integumentary System Structures Brain Spinal Cord
Nerves
Nerve Cell
Hypothalamus
Interacting Systems
Regulation and defense:
Nervous system alerts organism to danger and the digestive system helps produce vomit.
Integumentary System
Acts as a barrier against infection, injury, and UV radiation
Helps regulate body temperature
Structures
Epidermis
Dermis
Skin
Hair
Nails
Horns
Sweat Glands
Sebaceous Oil Glands
Hair Follicle
Interacting Systems
Interacts with the excretory system to produce sweat.
Interacts with the endocrine system and circulatory system to regulate body temperature.
Function
Function
Regulates the body’s response to changes in internal and external environments
Processes information

4. Circulatory System Structures Heart Veins Capillaries Arteries
Arterioles
Red Blood Cells
Interacting Systems
Defense:
Circulatory system and immune system protect the body from pathogens
Reproductive System
Structures
MALE:
Testicles
Sperm
FEMALE:
Ovaries
Egg
Uterus
Urethra
Interacting Systems
Reproductive:
Certain hormones produced in the endocrine system control ovulation in a female’s reproductive system.
Muscular system causes migration of the ovum by peristaltic contractions.
Function
Transports oxygen, nutrients, and waste
Regulates body temperature
Collects fluid lost from blood vessels and returns it to the circulatory system
Function
Produces reproductive cells
In females, it provides a good environment for an embryo

5. Excretory System Respiratory System
Structures
Bladder
Kidney
Ureter
Urethra
Interacting Systems
Toxin build-up would affect the nervous system.
Works closely with the circulatory system to return blood to the body once it is cleaned.
Respiratory System
Brings in Oxygen for Cells
Expels CO2 and Water
Structures
Nose
Trachea
Bronchi
Bronchioles
Lungs
Alveoli
Interacting Systems
Regulation:
Respiratory System increases the breathing rate, and the Circulatory System increases blood pressure to provide tissues with more oxygen.
Function
Eliminates waste products
Helps maintain homeostasis
Function

6. Body Systems Digestive System Structures Mouth Esophagus Stomach
Small Intestines
Large Intestines
Rectum
Anus
Salivary Glands
Pancreas
Liver
Gall Bladder
Interacting Systems
Works with Excretory system to excrete unused waste.
The muscular system helps move food through digestive system.
Nutrients absorbed by the digestive system, is carried to cells via the circulatory system.
Function
Breaks down and absorbs nutrients and water
Eliminates some waste