Anatomy
The study of body structure
6 levels of organization
Chemical, cellular, tissue, organ, organ system, organism
Physiology
The
... [Show More] study of body function
Epithelial tissue
Covers the body surface and lines the cavities. Is used for secretion and absorption; cells are constantly dividing to replace dead ones
Muscle tissue
A body tissue that contracts or shortens, making body parts move. 3 types: cardiac, skeletal and smooth
Cardiac muscle tissue
Striated and involuntary
Skeletal muscle tissue
Striated and voluntary
Smooth muscle tissue
Non-striated and involuntary
Connective tissue
Supports and protects body organs (e.g. bones, tendons, blood, + ligaments). Bind tissues and play supportive role
Nervous tissue
Communication between the cells of the body by forming a system of electrical impulses
Integumentary system
Layers that make up the skin (epidermis, dermis, hypodermis). Produces vitamin D and contains the pain and pressure receptors
Epidermis
Outer layer of skin
Dermis
Middle layer of skin
Hypodermis
Inner layer (aka subcutaneous tissue layer). Mostly fat and anchors the dermis to the fat cells (aka adipocytes) which help insulate and regulate body temperature
Skeletal system
Framework for muscular system and supports body organs. Protection for internal organs, houses blood cells, and stores minerals
Muscular system
Allows body to move - muscles attach to bones to bring movement to the skeletal system
Nervous system
Provides internal communication. Uses electrical impulses to communicate within the body and allows body to respond to internal and external environments
Digestive system
Breaks down food into small molecules which then enter the bloodstream through the small intestine and supply the body with nutrients
Endocrine system
Made of glands which make hormones to regulate the reproductive system and metabolism of the body
Metabolism
All of the chemical reactions that take place in the body that enable us to function
Catabolism
Breakdown of substances into their simpler building blocks
Anabolism
Synthesizing of more complex structures from simpler ones
ATP
Energy rich molecule that powers the cellular activities allowing cells to have the energy needed to carry out their functions
Cardiovascular system
Made of blood vessels which move blood, oxygen, and nutrients through the body
Lymphatic system
Part of the circulatory system. Responsible for immunity and fighting off disease. Has complex network of vessels and nodes that allow for the excess fluid to drain back to the heart
Respiratory system
Involved in excretion of waste CO2 and keeps blood supplied with O2
Urinary system
Excretion of waste from body and regulates water and electrolyte balance in blood
Systems which move nutrients and waste through the body
Cardiovascular, digestive, and urinary systems
Systems which remove waste from the body (excretion)
Digestive, urinary, and respiratory systems
Reproductive system
Controlled by hormones from the endocrine system
Superior (cranial)
Toward the head end or upper part of a structure or the body; above
Inferior (caudal)
Away from the head end or toward the lower part of a structure or the body; below
Ventral (anterior)
Toward or at the front of the body; in front of
Dorsal (posterior)
Toward or at the back of the body; behind
Medial
Toward or at the midline of the body; on the inner side of
Lateral
Away from the midline; on the outer side of
Intermediate
Between a more medial and a more lateral structure
Proximal
Closer to the origin of the body part or the point of attachment of a limb to the body trunk
Distal
Farther from the origin of the body part or the point of attachment of a limb to the body trunk
Superficial (external)
Toward or at the body surface
Deep (internal)
Away form the body surface; more internal
Flexion
Closing of a joint; bending
Extension
Opening of a joint; straightening [Show Less]