Histology Fundamentals
What are the four major tissue types found in the human body?
Epithelial, connective, muscle, and nervous
What does it mean when epithelial tissue is described as avascular?
It does not contain blood vessels.
What are the two main components of the extracellular matrix?
Ground substance and protein fibers.
What are the three types of muscle tissue?
Skeletal, cardiac, and smooth
What are the two major cell types found in nervous tissue?
Neurons and neuroglia.
What does the term histology mean?
The study of tissues
What is the difference between simple and stratified epithelium?
Simple has one cell layer; stratified has multiple layers.
Which two protein fibers are commonly found in connective tissue?
Collagen and elastic fibers
Which muscle tissue is voluntary, striated, and primarily responsible for moving bones?
Skeletal muscle
What is the primary function of neurons?
Receive stimuli and transmit nerve impulses.
Which major tissue type covers body surfaces, lines organs, and forms glands?
Epithelial tissue
What type of epithelial tissue lines the alveoli of the lungs and allows rapid gas exchange?
Simple squamous epithelium
Which connective tissue stores fat, provides insulation, and cushions organs?
Adipose tissue.
Which muscle tissue is involuntary, lacks striations, and is found in the walls of hollow organs?
Smooth muscle.
What is the primary function of neuroglia?
Support and protect neurons.
Which tissue type has cells spread throughout an extracellular matrix containing ground substance and fibers?
Connective tissue
Which epithelial tissue appears to have multiple layers because its nuclei are at different heights, but all cells touch the basement membrane?
Pseudostratified epithelium
What type of cartilage contains abundant elastic fibers and is found in the external ear?
Elastic cartilage.
Which muscle tissue contains branching cells connected by intercalated discs? controlled Involuntarily
Cardiac muscle.
A tissue sample contains cells inside lacunae and a smooth, glassy-looking matrix. Identify the tissue and one location where it is found.
Hyaline cartilage; found in the nose, costal cartilage, or ends of long bones.
A scientist examines two samples. Sample A has tightly packed cells and very little extracellular matrix. Sample B has scattered cells and abundant extracellular matrix. Identify both tissue types.
A = Epithelial; B = Connective.
A tissue contains multiple layers of flattened cells that protect against friction and abrasion. Identify the tissue and one location where it is found.
Stratified squamous epithelium; found in the epidermis, mouth, or esophagus.
A tissue contains collagen fibers arranged in parallel lines to resist pulling forces in one direction. Identify the tissue and one location where it is found.
Dense regular connective tissue; found in tendons and ligaments.
Both cardiac and skeletal muscle are striated. Explain one major difference between them and identify where each is found.
Cardiac muscle is involuntary and found in the heart. Skeletal muscle is voluntary and typically attached to bones.
A scientist finds connective tissue containing collagen fibers arranged in many different directions. Identify the tissue, explain why this arrangement is useful, and name one location where it is found.
Dense irregular connective tissue. The fibers resist pulling forces from multiple directions. Found in the dermis of the skin.