integumentary system

Question 1

what is the integumentary system

Answer 1

the largest organ in the body, forms a physical barrier between the external and internal environment

Question 2

what is the skin

Answer 2

largest organ, outer layer, 2mm thick in most places but it fluctuates in certain areas. 12 - 15% of body weight

Question 3

what is the epidermis

Answer 3

outermost layer
made up of stratified squamous epithial tissue cells and is divided into 4 sublayers:
- stratified corneum
- stratified granulosum
- stratified basale
an additional layer is in thicker parts such as the palms and feet, tjis is called the stratified lucidum

Question 4

what is the dermis

Answer 4

middle layer
protects and supports body
had blood vessles, sensory nerve receptors and response to stimuli

Question 5

structure and function of claws

Answer 5

narrow, arched structure that curves downwards from the end of digits. they are apapted for each species. hardened with keratin. they are adapted for clutching, scratching, digging or climbing.

Question 6

structure of horns

Answer 6

permanent pointed projections on the head of mammals. its covered in keratin and other proteins surrounding a core of live bone.

Question 7

what are cloven hooves

Answer 7

divided into approx 2 equal parts

Question 8

which animals are cephalopods

Answer 8

octopus, squid and cuttlefish

Question 9

adaptations of the cephalopods skin

Answer 9

their skin blends in with the natural environment. their skin is mad of stacks of thin cells thay can reflect light. by combining the reflection with the correct patterns to mimic the natural environment