Connective Tissue

Question 1

which primary germ layers do 1) epithelial, 2) connective 3)nervous tissue develop

Answer 1

1)ectoderm, endoderm and mesoderm
2) mesoderm
3)ectoderm

Question 2

cells of connective tissue

Answer 2

fibroblasts
adipocytes
mast cells
wbc
macrophages
plasma cells

Question 3

embryonic connective tisue

Answer 3

–>mesenchyme: differentatites from the mesoderm, gives rise to all otehr connective tissues, composed of loos enetwork of mesenchymal cells embedded in gelatinous ground substance

–>mucous (wharton’s jelly)
found in the umbilical chord

Question 4

loose connective tissue: areolar, adipose and reticular

Answer 4

-relatively sparse collagen fibres
- abundant viscous ground substance
- located beneth epithelia of body surfaces
- surround glands and blood vessels
- has resident and wandering immune cells
- site of inflammation

Question 5

aerolar loose connective tissue

Answer 5

• has all three types of fibres: collagen, elastic and reticular
• has a lot of ground substance
• fibroblasts, mast cells, wbc, and macrophages
• wraps and cushions organs
• imp role in inflammation

Question 6

adipose loose tissue

Answer 6

-adipocytes dominant cell type
equiloibrium between synthesis and breakdown of fat
matrix same as areolar but sparse
nuclei pushed to the side by fat droplets

Question 6

reticular loose tissue

Answer 6

network of reticular fibres in loose ground tissue, fibroblasts,
space amid fibres is full of blood cells, forms supportive framework fro lymphatic organs

Question 7

dense connective tissue : irregular, regular and elastic

Answer 7

numerous thick dense firbes, and fibres occupy more space than cells or ground tissue

Question 8

dense regular tissue

Answer 8

bundles of collagen fibres, regularly arranged in wave like patter, fibroblast nuclei between collagen, scarce blood vessels,, tendons and most ligaments

Question 9

dense irregular tissue

Answer 9

irregularly arranged collagen fibres, fibroblasts, used to withstand tension in many directions, dermis of skin, joint capsules

Question 10

dense elastic tissue

Answer 10

branching elastic fibres densely packed collagen and fibroblasts, strong and can recoil, lung tissue, arteries,

Question 11

formation of cartilage

Answer 11

chondroblasts secrete matrix around them until trapped in a cavity called a lacunae. they are then called chondrocytes.
ground substance made of proteoglycans and hyaluronic acid

Question 12

what is the perichondrium

Answer 12

dense irregular connective tissue that surrounds cartilage apart from articular cartilage

Question 13

types of cartilage

Answer 13

hyaline, fibrocartilage and elasti

Question 14

hyaline cartilage

Answer 14

amorphous but firm matrix,
collagen fibre networks
surrounded by the perichondrium
chondroblatss and chondrocytes
supports, reinfornces and cushions
articular cartilage and costal cartialge

Question 15

fibrocartilage

Answer 15

stronegst, tensile strength
sacattered chondroblasts in callogen fibres
lack perichondrium
intervertebral discs, knee joint

Question 16

elastic cartilage

Answer 16

elastic fibres forma weblike mesh amid lacunae, chondrocytes between them
always covered by perichondrium
strngth and elasticity
external ear, epiglottis

Question 17

types of cartilage growth

Answer 17

interstitial: growth from within
apositional: outer surface

Question 18

bones tissue

Answer 18

made of bone osseus tissue, periosteum and endosteum
hard and calcified
spongey bones lack osteons they have columns called trabeculae