CHAPTER 1: Introduction to Human Anatomy and Physiology Flashcards
refers to the study of the structure and shape of the body and its parts and their relationships to one another
Anatomy
deals with the structures of the body that are visible to the naked eye
Gross anatomy
Structures such as muscles, bones, digestive organs, or skin can be examined, historically, by means of
cadaveric dissections
study of body structures that are too small to be seen with the naked eye
Microscopic anatomy
refers to the study of how the body and its parts work or function
Physiology
LEVELS OF STRUCTURAL ORGANIZATION
Atom
Cell
Tissue
Organ
Organ System
Organism
Forms the external covering, protects deeper tissue from injury;
Integumentary System
Function of Integumentary System
-external covering
-protects deeper tissue from injury
-synthesizes vitamin D
-location of sensory receptors
Example of location of sensory receptors
pain, pressure
Protects and supports body organ, provides a framework the muscles used to cause movement, blood cells are formed within bones; stores minerals.
Skeletal System
Function of Skeletal System
-Protects and supports body organ
-framework the muscles use for movement
-location of formation of blood cells
-store minerals
Allows manipulation of the environment, locomotion and facial expression; maintains posture and produce heat.
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 used by body cells.
Endocrine System
Blood vessels transport blood which carries oxygen, nutrients, hormones, carbon dioxide, waste; the heart pumps blood.
Cardiovascular System
transport blood which carries oxygen, nutrients, hormones, carbon dioxide, waste; the heart pumps blood.
Blood vessels
Picks up fluid, leaks from body vessels and return 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. Gas exchange occurs through the walls of the air sacs of the lungs.
Respiratory System
Breaks down food into absorbable nutrients that enter the blood for distribution to body cells; in there it just a bowl. Indigestible foodstuffs are eliminated as faces.
Digestive System
urinary system regulate
water, electrolyte and acid base balance of the blood.
Eliminates nitrogen-containing waste from the body, regulates water, electrolyte and acid base balance of the blood.
Urinary System
produces sperm and male sex hormones
testes
aid in delivery of viable sperm to the female reproductive tract.
ducts and glands
produce eggs and female sex hormones
Ovaries
produce milk to nourish the newborn
Mammary glands of female breasts
Every cell of the human body is surrounded by an ______ that separates its contents from the outside interstitial fluid (fluid between cells) and allows entry of needed substances while generally preventing entry of potentially damaging or unnecessary substances.
external membrane
The body as a whole is also enclosed by the
integumentary system or skin
protects internal organs from threats coming from the external environment
integumentary system or skin
all the activities promoted by the muscular system
movement
provides the bones that the muscles pull on as they work
skeletal system
ability to sense changes (stimuli) in the environment and then to react to them
responsiveness or irritability
process of breaking down ingested food into simple molecules that can then be absorbed into the blood
Digestion
Difference between Digestion and Metabolism
Digestion- break down food into smaller particles
Metabolism- break down molecules
refers to all chemical reactions that occur within the body and all of its cells
Metabolism
Metabolism is regulated chiefly by _____ secreted by the glands of the endocrine system
hormones
Expel out waste and toxins in the body
Excretion
Organs used in excretory system
skin-perspiration
liver- ammonia/RBC
rectum-food
kidney- urine
lungs- carbon dioxide
production of offspring, can occur on the cellular or organismal level.
reproduction
Difference between cellular reproduction and organismal reproduction
cellular reproduction- cell division
organismal reproduction- by birth
The function of the reproductive system is regulated very precisely by _____ of ______.
hormones
the endocrine system
can be an increase in cell size or an increase in body size that is usually accomplished by an increase in the number of cells.
Growth
two types of growth
Increase in cell size
Increase of cell number
For growth to occur, ______________ must occur at a faster rate than cell-destroying ones.
cell-constructing activities
released by the endocrine system plays a major role in directing growth.
hormones
SURVIVAL NEEDS (5)
- Nutrients
- Oxygen
- Water
- Normal Body Temperature
- Atmospheric Pressure