Ch.1 The Human Body Flashcards
Anatomy
Study of the structure of the body parts and how these parts are related to each other
Gross (macroscopic)
Study of large body parts – visible to the naked eye (organs). Shape, position, relationship to other structures
Surface
Study of internal structure as related to overlying skin surface (muscle, blood vessels)
- structures under the skin
Microscopic
Study of small structures, using a microscope
Cytology
study of cells
Histology
study of tissues
Physiology
Study of the function of body parts, how they work
Principle of Complimentary
- function always reflected in structure
- what a structure is capable of doing depends on its form
Examples of the principle of complementary
- Muscles can contract because they have contractile
units - The kidneys filter blood because they contain filtration membranes
- RBCs carry O2 because they are full of hemoglobin = a pigment causes skin to become red
Atom
- 1st step to body organization
- atoms combine to form molecules
- made up of 3 particles: protons, neutrons and electrons
- chemical level
molecule
- 2nd step to body organization
- atoms bonded together
- chemical level
cell
- 4th step to body organization
- made of molecules
-cellular level - Ex: smooth muscle cell
organelle
- 3rd step to body organization
- a specialized structure in a living cell
- cellular level
tissues
- 5th step to body organization
- consists of similar types of cells
- tissue level
- Ex: smooth muscle tissue
organ
- 6th step to body organization
- made of different types of tissues
- organ level
organ system level
- 7th step to body organization
- made of different organs working closely
organism level
- 8th step to body organization
-made up of many organ systems
integumentary system
- consists of skin, hair and nails
function: - forms the external body covering and protects deeper tissues from injury
-synthesizes vitamin C - houses cutaneous receptors, sweat and oil glands
skeletal system
- consists of bones and joint
function: - protects and supports body organs
- provides framework to muscles for movement
- blood cells formed within bones
- bones store minerals
muscular system
- consists of muscles
function: - allows manipulation of locomotion and facial expression
- maintains posture
- produces heat
nervous system
- consists of brain, spinal cord and nerves
function: - control system of body
- responds to internal and external changes by activating muscles and glands
endocrine system
- consists of glands, thymus, pancreas, ovary and testis
function: - glands secrete hormones that regulate growth, reproduction and nutrient use (metabolism) by body cells
Cardiovascular system
- consists of heart and blood vessels
function: - blood vessels transport blood to carry oxygen, CO2, nutrients and waste
- heart pumps blood
Lymphatic system
- consists of red bone marrow, thymus, lymphatic vessels, thoracic duct, spleen, lymph nodes
function: - picks up fluid leaked from blood vessels and return it to blood
- houses white blood cells (lymphocytes involved in immunity)
- immune response mounts the attack against foreign substances within body
Respiratory system
- consists of nasal cavity, pharynx, larynx, trachea, bronchus and lungs
function: - keeps blood constantly supplied with oxygen and removes CO2
- gaseous exchanges occur through walls of air sacs of the lungs
Digestive system
- consists of oral cavity, esophagus, liver, stomach, small intestine, large intestine, rectum, anus
function: - breaks down food into absorbable units that enter the blood for distribution to body cells
- indigestible food eliminated as feces
urinary system
- consists of kidney, ureter, urinary bladder, and urethra
function: - eliminates nitrogenous wastes from the body
- regulates water, electrolyte and acid-base balance of the blood
Male reproductive system
- consists of testes to produce sperm and male sex hormone
- male ducts and glands aid in delivery of sperm to the female reproductive tract
- Function: production of offspring
Female reproductive system
- ovaries produce eggs and female sex hormones
- remaining female structure are sites for fertilization and development of the fetus
- mammary glands of female breasts produce milk to nourish the newborn
- function: production of offspring
General Life Functions
- Maintaining Boundaries = separate outside world from the inner body
- Movement = locomotion, plus through tubes
- Responsiveness = sense changes in the environment and respond to
them - Digestion = taking in nutrients
- Metabolism = processing energy and nutrients
- Excretion = removal of waste
- Reproduction = make offspring
- Growth = increase size
Homeostasis
- Ability to maintain stable, favorable internal conditions even though there are changes in the external environment
homeostatic control systems
- negative feedback
- positive feedback