1. Organization of Your Body

2. Organization of Your Body
There are four levels of organization, it is called a HIERARCHY.
1. Cells;
2. Tissues;
3. Organs;
4. Organ Systems. 2

3. Organization of Your Body
Tissues: are groups of cells that are similar in structure and function
In adult vertebrates, there are four primary tissues:
-Epithelial,
-Connective,
-Muscle,
-Nerve Tissue.
All preform different bodily functions, thus are different cells. 3

4. Epithelial Tissue Epithelial Tissue:
Separates, protects, and keeps organs in place.
Covers the body surface and forms the lining of most organs.
Ex: Skin (epidermis), & inside of mouth 6

5. Connective Tissue Connective Tissue-
Provides support and structure to the body, also fills spaces.
The most abundant tissue in the human body. 
Ex: Blood, bones, cartilage, and fat.

6. Muscle Tissue
Muscle Tissue -Contracts and relaxes to support movement.
Three types: Skeletal, smooth, and cardiac.
Ex:
Cardiac muscle contracts to pump blood through the body;
Skeletal muscle moves the bones when directed by brain.
Smooth muscle contracts in digesting;

7. Nerve Tissue Nerve Tissue - responds to stimuli in the environment;
- controls movement, reflexes, and receives sensory information;
Ex:
Brain tissue,
Spinal Cord Tissue,
Peripheral nerve cells.

9. Animal Organs
Organ, a group of tissues in a living organism that have been adapted to perform a specific function.
In higher animals, organs are grouped into organ systems; e.g., the esophagus, stomach, and liver are organs of the digestive system.

10. SUMMARY OF ANIMAL ORGAN SYSTEMS

11. Integumentary Major Organs: Skin Hair Nails Sense receptors
Sweat Glands
Functions:
act as a barrier to protect the body from the outside world and regulate body temperature.
Connections to other Systems:
Immune system, digestive system, circulatory system, and nervous system

12. Skeletal Major Organs: Bones Joints Function:
Provides structure; supports and protects internal organs
Connections to other Systems:
Muscular System, Nervous System, Circulatory System

13. Muscular Major Organs: Ligaments Tendons
Function: Provides structure; supports and moves trunk and limbs
Connection to other Systems:
Skeletal System, Circulatory System, & Nervous System.

14. Circulatory/Cardiovascular
Major Organs
Heart
Blood
Veins
Arteries
Capillaries
Function: Transport nutrients and wastes to and from all body tissues
Connection to other Systems:
ALL other body systems!

15. Respiratory Major Organs: lungs Pharynx Larynx Trachea Diaphragm
Function:
Carries air into and out of lungs, where gases (oxygen and carbon dioxide)
Connection to other Systems:
ALL because it supplies the body with oxygen and takes out carbon dioxide

16. Immune/Lympatic Major Organs: Lymph nodes Lymph vessels Thymus Spleen
Tonsils
Function: Provides protection against infection and disease
Connection to other Systems:
Circulatory System, Digestive System, Urinary/Excretory System & Nervous System.

17. Digestive Major Organs: Mouth tongue esophagus salivary glands
stomach liver
pancreas small intestine
large intestines
Function: Stores and digests food; absorbs nutrients; eliminates wastes
Connection to other Systems:
Circulatory System, Excretory System & Nervous System.

18. Digestive Path of Food: MOUTH ESOUAGHUS STOMACH SMALL INTESTINE
LARGER INTESTINE
ANUS

19. Urinary/Excretory Major Organs: Kidneys ureters bladder urethra
skin* lungs**
Function: Eliminates waste; maintains water and chemical balance
* waste thru skin: sweat
** waste thru lungs: CO₂

20. Nervous Major Organs: Brain spinal cord nerves Brain Stem Function:
Controls and coordinates body movements and senses; controls consciousness and creativity; helps monitor and maintain other body systems
Connection to other Systems:
ALL other body systems because it send electrical signals which control their functions.

21. Endocrine Major Organs: Pituitary gland Hypothalamus
Thyroid gland Parathyroid
Thymus Adrenals
Function: Maintains homeostasis; regulates metabolism, water and mineral balance, growth and sexual development, and reproduction
Connection to other Systems:
ALL other body systems because it supplies the hormones that help them function.

22. Reproductive Major Organs:
Ovaries, uterus, mammary glands (females), testes (males)
Function:
Produces offspring
Connection to other Systems:
Nervous System, Circulatory System, & Endocrine System,