Tissue Flashcards
A group of similar cells and extracellular substance that have combined to perform a single function.
Tissue
What are the 4 types of Tissues?
- Epithelial tissue
- Connective Tissue
- Muscular tissue
- Nervous Tissue
Composed of cells laid together in sheets that is tightly connected, one to the next.
Also called Epithelium
Epithelial tissue
True or False
Epithelial tissue has blood vessels and has extracellular substances between the cells.
False: Epithelial tissue has neither blood vessels nor any extracellular substances between the cells.
One layer of cells and usually functions as a diffusion or absorption membrane.
Simple epithelium
Many layers of cells and is designated for protection.
Stratified epithelium
It binds, supports and anchors the organs.
Connects bodily structures.
Connective Tissue
The most abundant type of tissue in the body.
It is composed of cells suspended in a matrix.
Connective Tissue
It is secreted by the connective tissue cells.
Determines the characteristics of the connective tissue.
Matrix, or “ground substance”
The ground substance of all connective tissue contains _________ (for strength) and _______ (for flexibility, stretch and recoil)
Fibers of collagen and Elastin
Loose, dense and elastic
They are flexible and their strength varies based on the number and orientation of the collagen fibers.
Soft Connective Tissue
Give an example of Soft connective tissue
- Skin
- Tendons
- blood vessels
It includes Cartilage, Blood, Bone and Lymph
Specialized Connective Tissue
It has no blood supply
Cartilage
_________ must obtain nutrients and release waste via diffusion through the matrix
Chondrocytes
Consists of a hard matrix surrounding living cells. Both has blood supply and nerve supply.
Bone
The matrix of compact bone is found in long cylinders called?
Osteons or Haversian systems.
True or False
Lighter, spongy bone has less structure and is formed in bars and supports rather than as s solid mass.
True
Fluid connective tissue because its matrix is not solid.
Blood
It is composed of specialized cells that are carried in the fluid matrix (plasma)
Main function is to transport nutrients, gases, hormones, and wastes.
Blood
Another fluid connective tissue.
Derived from the interstitial fluid that bathes the body cells and is collected in the lymphatic vessels.
Lymph
Its function is to contract.
Muscular Tissue
What are the 3 types of Muscle tissue?
- Skeletal Muscle
- Smooth Muscle
- Cardiac Muscle
Long, lying along the length of the muscle tissue itself
Attached to bones by tendons ——> voluntary movements
Skeletal Muscle
Short string bean-shaped cells joined together
Control involuntary movements of internal organs and blood vessels
Smooth Muscle
Branched and tightly joined together
Involuntary beating of the heart
Cardiac Muscle
Specialized communication junctions called?
Intercalated discs
Facilitate the heartbeat by transmitting the signal to contract.
Intercalated discs
It responds to changes in the environment
Nervous tissue
Cells that carry electrical impulses
Neurons
Receives impulses from other neurons, bringing the information to the cell body.
Dendrite
Transmits impulses from the cell body to other cells
Axon
True or False
Individual neurons have many dendrites, and many axon.
False: Individual neurons have many dendrites, but each can have only one axon.
Improve nutrient flow to the neurons, provide physical support, remove debris and provide electrical insulation.
Neuroglia
Clusters of neurons and their projections, sheathed in connective tissue.
Nerves
