Part 3 - Tissues Flashcards
(33 cards)
is trin weird
yes
What are erythrocytes?
Red blood cells
What are leukocytes?
White blood cells
What are thrombocytes?
Platelets
What is the function of Plasma
To provide a transport medium for wastes and nutrients
Erythrocyte structure:
-are red
-they have no nucleus, no mitochondria
-Their structure includes an iron group and a globin (a quaternary protein) (making up hemoglobin)
Erythrocytes Function
To carry oxygen. Each red blood cell can carry approximately 1,000,000,000 molecules of oxygen at a time
Erythrocytes Location
Circulatory system (produced in RED bone marrow)
How many different kinds of leukocytes are there?
5 kinds
What is the function of Leukocytes?
Aid in immunity
Function of Thrombocytes:
To produce blood clots which prevent blood loss
Thrombocytes structure:
-Not true cells
-fragments made from a very large white blood cell (megakaryocyte)
-Fibrin, a sticky protein found in platelets is responsible for their stickiness
Lymph function
Plays a vital role in maintaining blood volume and ultimately blood pressure
Lymph structure:
Mainly water but contains white blood cells, fat molecules and ions
What are the 3 types of Muscular tissue
skeletal
smooth
cardiac
Muscle tissue is composed of two contractile Proteins.
What are they?
Actin & Myosin
Skeletal muscle:
-Function
-Location
Function: move bones at the joints, to control respiration and control blood flow in veins and lymphatic vessels
Location: connecting to bones via tendons
Smooth muscle:
-Structure
-Function
-Location
Structure: Is spindle shaped with a long single nucleus, is non-striated and visceral
Function: controls involuntary movement. Responsible for Peristalsis. also regulates blood pressure in arteries and the action of sphincters
Location: In the internal walls of many organs
Cardiac Muscle:
-Structure
-Function
-Location
Structure: Involuntary and striated. Is the only Muscle tissue to have intercalated disks
Function: Contraction of the chambers of the heart in order to move blood through it
Location: Only located in the heart
Function of Neurons:
-Conduct an electrical impulse to the central nervous system
-Integrate the information within the central nervous system
-Transmit the impulse back to the organ or gland responsible for the response
Nervous Tissue - Dendrite
Dendrite receives impulse from neighbouring neuron or sensory receptor and send impulse towards the cell body (soma)
Nervous Tissue - Cell body (soma)
Contains the nucleus and cell organelles
Nervous Tissue - Axon
Nerve fiber which carries the impulse from the cell body to the axon terminals. It is often covered with a myelin sheath.
Nervous Tissue - Myelin sheath
The Myelin sheath is a fatty substance acting as insulation for the axon. Myelin degeneration car result in MS
