animal tissues 🪱

Question 1

Epithelial tissue

Answer 1

• specialized to form linings that cover internal and external surfaces
• cells are arranged tightly against each other,with almost no intercellular spaces
  ~ squamous, cuboidial, columnar,ciliated columnar epithelium

Question 2

Squamous epithelium

Answer 2

• (squashed) ; ( mosaic)
• lines internal walls of cavities : blood vessels, heart, alveoli, mouth, oesophagus
• single layer of flat, thin cells
• protects underlying tissues
• prevents friction

Question 3

Cuboidal ephithelium

Answer 3

• lines glands that secrete or absorb substances
• lining of: thyroid gland, sweat
  gland, salivary gland, ovaries
• cube shaped cells
• round nuclei in centre of cell
• for secretion and absorption on substances

Question 4

Columnar epithelium

Answer 4

• lines alimentary canal: stomach, intestine
• cells are long and column shaped
• have goblet cells that secrete mucus
• for absorption, secretion, a d sensation

Question 5

Ciliated columnar epithelium

Answer 5

• lines :nasal cavities,trachea,bronchi ;
• found in :ears, fallopian tubes, uterus
• has fine hairs (cilia)
• clilia perform fast, rhythmical wave-like movements in a specific direction
• helps detect stimuli in sensory organs

Question 6

Connective tissue

Answer 6

• binds, supports, surrounds other tissues or organs

- areolar connective tissue, dense connective tissue, cartilage, bone ,blood

Question 7

Areolar connective tissue

Answer 7

• connects skin to underlying muscles
• serves as packing tissue ; fills space between organs,blood vessels,nerves and muscles
• has: •white inelastic collagen fibres • yellow elastic fibres
• serves as insulating material
• protects organs by serving as a packing tissue

Question 8

Dense connective tissue

Answer 8

• joins muscle to bone ( tendons *white inelastic fibres )
• joins bone to bone ( ligaments * yellow elastic fibres)
• allow for movement

Question 9

Cartilage

Answer 9

• tough, elastic connective tissue that forms part of endoskeleton
• hyaline, fibrous, elastic
• occurs between bones ; lines joints
• connects bone to bone
• acts as a shock absorber between vertebrae
• prevents friction in joints

Question 10

Bone

Answer 10

• similar to cartilage, but harder
• contains of a hard matrix
• is a supporting framework that gives shape and rigidity
• protects delicate organs
• place of attachment to muscles to make movement possible
• mineral storage

Question 11

Blood

Answer 11

• only liquid connective tissue
• has no fibres
• sticky, dark- red, opaque fluid
• circulates in the blood vessels of the bold system : arteries, veins, capillaries
• red blood cells, white blood cells, blood platelets
• transports nutrients from the digestive system to tissues
• produce antibodies that destroyed bacteria and viruses