Human Anatomy And Physiology
Human Anatomy and Physiology
Anatomy - the study of the form or structure and arrangement of body parts and their relationships
Physiology - the study of the functions of the body parts or structures and their relationships in maintaining life processes.
Levels of Structural Organization
The human body consists of levels of structural organization that are associated with one another.
There are six levels of structural organization:
I. chemical level - It is the simplest level and it includes all of the chemical substances essential for maintaining life.
These substances are made up of atoms.
An atom is the smallest unit of matter. Matter is anything that takes up space and has mass.
Atoms combine to form molecules, which may be …show more content…
Organelles are specific structures that carry out specific functions.
2. cellular level - The cell is the basic unit of structure and function and of life. Cells vary in size, shape, and function and may contain many types of organelles.
3. tissue level - Tissues are groups of similar cells that perform a specific function.
There are four major types of tissues in the human body:
a.
epithelial tissue - It is found lining body cavities and covers the surface of the body.
It functions in protection, secretion, and excretion.
b. connective tissue - It is found on the surfaces of and in organs and tissues and functions in protection, support, and attaching organs and tissues to each other and to the walls of body cavities.
c. muscle tissue - It functions in the movement of body parts and organs, and in the movement of substances throughout the body.
There are three major types of muscle tissue:
(1)
skeletal muscle - It is found attached to and covering bones and it functions in body movement. (2)
cardiac muscle - It is located in the heart wall and functions in the contraction and relaxation of the heart as it beats.
(3)
smooth muscle - It is located in the walls
Anatomy - the study of the form or structure and arrangement of body parts and their relationships
Physiology - the study of the functions of the body parts or structures and their relationships in maintaining life processes.
Levels of Structural Organization
The human body consists of levels of structural organization that are associated with one another.
There are six levels of structural organization:
I. chemical level - It is the simplest level and it includes all of the chemical substances essential for maintaining life.
These substances are made up of atoms.
An atom is the smallest unit of matter. Matter is anything that takes up space and has mass.
Atoms combine to form molecules, which may be …show more content…
Organelles are specific structures that carry out specific functions.
2. cellular level - The cell is the basic unit of structure and function and of life. Cells vary in size, shape, and function and may contain many types of organelles.
3. tissue level - Tissues are groups of similar cells that perform a specific function.
There are four major types of tissues in the human body:
a.
epithelial tissue - It is found lining body cavities and covers the surface of the body.
It functions in protection, secretion, and excretion.
b. connective tissue - It is found on the surfaces of and in organs and tissues and functions in protection, support, and attaching organs and tissues to each other and to the walls of body cavities.
c. muscle tissue - It functions in the movement of body parts and organs, and in the movement of substances throughout the body.
There are three major types of muscle tissue:
(1)
skeletal muscle - It is found attached to and covering bones and it functions in body movement. (2)
cardiac muscle - It is located in the heart wall and functions in the contraction and relaxation of the heart as it beats.
(3)
smooth muscle - It is located in the walls