Animal Tissues Flashcards
How many types of animal tissue are there?
Four
What are the four types of animal tissue?
Epithelial
Connective
Muscle
Nerve
How many types of epithelial tissue are there?
Four
How many types of connective tissue are there?
Five
How many types of muscle tissue are there?
Three
How many types of nerve tissue are there?
Two
What are the four types of epithelial tissue?
Squamous
Cuboidal
Columnar
Ciliated
What are the five types of connective tissue?
Areolar Dense Cartilage Bone Blood
What are the three types of muscle tissue?
Striated
Smooth
Cardiac
What are the three types of nerve tissue?
Motor
Sensory
Interneurons
What does epithelial tissue do?
Cover internal and external surfaces
What is the general appearance of epithelial tissue?
Tightly packed
Few intercellular air spaces
Little material between cells
What is simple epithelial tissue?
Single cellular layer
Rests on a basal membrane
What is stratified epithelial tissue?
Multiple layers of cells
Where can squamous epithelium be found?
In the internal walls of cavities
Blood vessels, heart, alveoli, mouth oesophagus
What is endothelium?
The squamous epithelium that lines the inside of blood vessels
What is endocardium?
The squamous epithelium that lines the heart
What does squamous epithelium look like?
Single layer Thin Flat Tightly packed Arranged Ina mosaic pattern Nucleus horizontally flat and oval shaped
What does squamous epithelium do?
Prevents friction
Is permeable to gases and liquids
Protects underlying tissues
Where can cuboidal epithelium be found?
Lines glands that secrete or absorb Thyroid gland Sweat glands Salivary glands Renal tubules Embryonic epithelium
What is embryonic epithelium?
Gives rise to ova
And sperm
What does cuboidal epithelium look like?
Cube shaped
Nuclei are round and occur in the centre of the cell
What is the function of cuboidal epithelium?
Secretion
Absorption
What is secretion?
Release of useful substances
What is absorption?
Taking in substances
Where does columnar epithelium occur?
Alimentary canal If performing a sensory function: Nose Ears Taste-buds
What does columnar epithelium look like?
Elongated (column shaped)
Nuclei near the base of cells
What are goblet cells?
Columnar epithelium with a dip
What do goblet cells do?
Secrete mucous
What is the function of columnar epithelium?
Absorption
Secretion
Sensation
What forms multicellular glands?
Specialised cuboidal and columnar epithelium
What substances do multicellular glands secrete?
Enzymes Hormones Milk Mucous Sweat Wax Saliva
Where can ciliated epithelium be found?
Nasal cavities Trachea Bronchi Sensory organs (ear) Fallopian tubes Uterus
What does ciliated epithelium look like?
Columnar cells
With fine hairs (cilia)
What do the cilia on ciliated epithelium do?
Perform fast, rhythmical wave-like movements
What is the function of ciliated epithelium?
Move mucous away from the lungs (particularly dust particles trapped within the mucous)
Detect stimuli in sensory organs
Move the ovum
What does connective tissue do?
Binds, supports or surrounds other tissues or organs
What makes up the largest part of connective tissue?
The matrix that occurs between the cells and fibres
What can the matrix be?
Non-living
Fluid
Semi-fluid/jelly-like
Solid
Where can areolar connective tissue be found?
Layer beneath the skin
As packing tissue (between organs, blood vessels, nerves and muscles)
What is the areolar tissue like?
Jelly-like matrix
Two types of fibres within it
With other cells dispersed in it
What two kinds of fibres can be found in areolar connective tissue?
Yellow
White
What are yellow areolar fibres like?
Elastic
Branched
What are white areolar fibres like?
Inelastic collagen
Parallel
What cells can be scattered in the matrix of areolar tissue?
Fibroblasts Macrophages Mast cells Fat cells Lymphocytes
What does areolar connective tissue do?
Prevents heat loss (insulation)
Protects the organs (as packing tissue)
What is adipose?
Areolar connective tissue that has a large number of fat cells
Where can dense connective tissue be found?
Near muscles and bones
In joints
What are the two types of dense connective?
Tendons
Ligaments
What are ligaments like?
Connect bone to bone
Are elastic
What are tendons like?
Inelastic
Connect muscle to bone
What is dense connective tissue like?
Small amount of matrix
Small number of cells
Lots of parallel fibres
How does a ligament differ from a tendon in appearance?
Ligament: more yellow fibres
Tendon: more white fibres
What do ligaments do?
Permit a degree of movement in joints
What do tendons do?
Relay muscle contraction and relaxation to the bone so that movement can take place
What is cartilage?
Tough elastic connective tissue
Forms part of the endoskeleton for vertebrates
Where can cartilage be found?
Between bones
Lines joints
Forms some permanent structures (pinna, tip of the nose, c-shaped rings in the trachea)
What are the three types of cartilage?
Hyaline
Fibrous
Elastic
What is hyaline cartilage like?
Glass-like
Has few fibres