Chapter 2: Body Arrangement Flashcards
How is the body arranged?
Body- Systems- Organs- Tissues- Cells
What do cells always contain?
Cell membrane, Cytoplasm, Nucleus
Cell Membrane
outermost boundary of the cell; encloses the cytoplasm
Cytoplasm
Watery internal environment inside the cell
Cytology
study of cells and their functions
Nucleus
contains the cell’s DNA
Define Cells
Smallest structure of a body that has all the properties of being alive
What are all the properties of being alive?
Responding to stimuli
Engaging in metabolic activities
Reproducing itself
What are the functions of cells?
reproduction, hormone secretion, energy production, and excretion
What are the specific functions?
contraction by muscle cells and electrical impulse transmission by nerve cells
Histology
the study of tissues
How are tissues formed?
when like cells are grouped together and function together to perform a specific activity
How many types of tissues?
4: muscle tissue, epithelial tissues, connective tissue, and nervous tissue
What do muscle tissues do?
Produces movement in the body through contraction, or shortening in length
What are the 3 basic types of muscle tissues?
skeletal muscle, smooth muscle, or cardiac muscle
Cardiac muscle
found in the heart
Smooth muscle
found in internal organs (intestine, uterus, and blood vessels)
Muscle Fibers
individual muscle cells
Skeletal Muscle
attached to bone
What is Epithelial Tissue?
Found throughout the body and is composed of close-packed cells that form the covering for and lining of body structures.
Specialized to absorb substances (nutrients from the intestines), secrete substances (sweat glands), or excrete waste ( such as the kidney tubules)
Epithelium
Epithelial
What are Connective Tissues?
Supporting and protecting tissue in body structures
Performs many different functions depending of its location
What is the role of Adipose?
provides protective padding around body structure
What is the role of Bone?
provides structural support for the body