ch8- cell diversity

tissue

a group of similar cells that are adapted to carry out the same function

name 2 types of plant tissue

dermal and vascular

name a type of dermal tissue

epidermis

name the parts of an epidermis on a plant

nucleus, cytoplasm, vacuole, cell wall(thick), cuticle

whats the function of a cuticle on the plant epidermis?

to waterproof

the main function of the epidermid

to protect the plant (or skin)

name the 2 types of cells in plant vascular tissue

xylem and phloem

what is the tube opening in the xylem called?

pits

whats the function of the xylem?

transpoting water and dissolved minerals around the plant

and to provide support

the function of phloem

transporting food away from the leaves

name 2 types of animal tissue

connective and nervous

whats the function of conective tissue?

joins and supports body structures

an example of connective tissue

adipose tisse, bone and blood

what is nervous tissue composed of?

neurons

whats the function of nervous tissue?

carries electrical impulses to and from the CNS

tissue culture

the growth of cells in/ on a sterile nutrient medium, outside an organism

in vitro

the growth of cells in an artificial environment

name 2-3 applications of tissue culture

micropropagation, cancer research and skin graphs

what is micropropigation?

the growth of many plants from very small plant pieces eg.tissues or cells

what are the 5 stages of micropropigation? ft a carrot

what does the growth of a plant of tissues from few cells show?

that each neucleus has all the genes needed to form an organism

3 benifits of micropropigation

-large number of plants, short time

-genetically identical

-inexpensive to make many identical plants

what is used to grow skin?

stem cells

stem cells

cells that can develop into any body tissue

where are stem cells found?

bone marrow and umbilical cords

2 benifits of skin produced by tissue culture

-no need to remove skin from other part of body

-new skin is perfect match and is not rejected by their body