The Human Body Flashcards
Study of the structure and shape of the body and its parts
anatomy
Observation is used to see sizes and relationships of parts
anatomy
Large structures
gross anatomy
Easily observable
gross anatomy
breaks down food into absorbable nutrients that enter the blood for nutrient distribution to body cells; indigestible food stuffs are eliminated as feces
digestive system
Structures are too small to be seen with the naked eye
MICROSCOPIC ANATOMY
Cells and tissues can be viewed only with a microscope
MICROSCOPIC ANATOMY
Structure determines what functions can occur
PHYSIOLOGY
Study of how the body and its parts work or function
PHYSIOLOGY
For example, the air sacs of the lungs have very thin walls, a feature that enables them to exchange gases and provide oxygen to the body
PHYSIOLOGY
Six levels of structural organization
- Atoms
- Cells
- Tissues
- Organs
- Organ systems
- Organisms
Forms the external body covering (skin) and includes hair and fingernails
INTEGUMENTARY SYSTEM
o Waterproofs the body
INTEGUMENTARY SYSTEM
o Cushions and protects deeper tissue from injury
INTEGUMENTARY SYSTEM
o Produces vitamin D with the help of sunlight
INTEGUMENTARY SYSTEM
o Excretes salts in perspiration
INTEGUMENTARY SYSTEM
Helps regulate body temperature
INTEGUMENTARY SYSTEM
o Location of cutaneous nerve receptors
integumentary system
o Consists of bones, cartilages, ligaments, and joints
SKELETAL SYSTEM
o Provides muscle attachment for movement
SKELETAL SYSTEM
o Protects vital organs
SKELETAL SYSTEM
o Stores minerals
SKELETAL SYSTEM
o Site of blood cell formation
SKELETAL SYSTEM
o Skeletal muscles contract (or shorten)
MUSCULAR SYSTEM
o Produces movement of bones
MUSCULAR SYSTEM
fast-acting control system of the body; responds to internal and external changes by activating appropriate muscles and glands
nervous system
glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use by body cells
endocrine system
blood vessels transport blood, which carries oxygen, nutrients, hormones, carbon dioxide, wastes, etc.; the heart pumps blood
cardiovascular system
picks up fluid leaked from blood vessels and returns it to blood; disposes of debris in the lymphatic stream; houses white blood cells involved in immunity
lymphatic system
keeps blood constantly supplied with oxygen and removes carbon dioxide; the gaseous exchanges occur through the walls of the air sacs of the lungs
respiratory system
eliminates nitrogen-containing wastes from the body; regulates water, electrolyte, and acid-base balance of the blood
urinary system
o For males, includes the testes, scrotum, penis, accessory glands, and duct system
Testes produce sperm
Duct system carries sperm to exterior
REPRODUCTIVE SYSTEM
maintaining life: necessary life functions
maintaining boundaries
movement
responsiveness (irritability)
digestion
necessary life functions
metabolism
excretion
reproduction
growth
o Boundaries separate the “inside” from the “outside”
maintaining boundaries
o Locomotion
o Movement of substances
movement
o Ability to sense changes and react
responsiveness (irritability)
- chemical reactions within the body
metabolism
o For females, includes the ovaries, uterine tubes, uterus, and vagina
Ovaries produce eggs
Uterus provides site of development for fetus
REPRODUCTIVE SYSTEM
Breaks down complex molecules into smaller ones
metabolism
Builds larger molecules from smaller ones
metabolism
Produces energy (ATP)
metabolism
o Hormones play a major role
Growth
Produces energy (ATP)
metabolism
o Eliminates excreta (waste) from metabolic reactions
Excretion
o Wastes may be removed in urine, feces, or sweat
Excretion