1. Highly branched to increase surface area
2. Thin to reduce distance covered by diffusing gases (once cell thick)
3. Moist to dissolve diffusing gases.
raphael answered the question on September 12, 2017 at 05:25
-
Discuss the motor sensory and perceptual development of a child
(Solved)
Discuss the motor sensory and perceptual development of a child
Date posted:
September 7, 2017
.
Answers (1)
-
Name the blood vessel that transports blood from cardiac muscles to vena cava
(Solved)
What is the name of the blood vessel that transports blood from cardiac muscles to vena cava?
Date posted:
September 5, 2017
.
Answers (1)
-
Name the blood vessel that transports blood from small intestine to the liver
(Solved)
What is the name given to the blood vessel that transports blood from small intestine to the liver?
Date posted:
September 5, 2017
.
Answers (1)
-
The diagram below represents bones at a joint found in the hind limb of a mammal.
(Solved)
The diagram below represents bones at a joint found in the hind limb of a mammal.
(a) Name the bones labeled X, Y and Z
(b) (i) Name the substance found in the place labeled W.
(ii) State the function of the substance named in (b) (i) above.
(c) Name the structure that joins the bones together at the joint.
(d) State the differences between ball and socket joint and the one illustrated in the diagram above.
(e) Name the structure at the elbow that performs the same function as the same function as the patella.
Date posted:
May 26, 2017
.
Answers (1)
-
State the characteristics that is common to all cervical vertebrae.
(Solved)
State the characteristics that is common to all cervical vertebrae.
Date posted:
May 26, 2017
.
Answers (1)
-
Name the type of skeleton that makes up each of the following animals:
(a) locust (b) bird
(Solved)
Name the type of skeleton that makes up each of the following animals:
(a) locust (b) bird
Date posted:
May 26, 2017
.
Answers (1)
-
State two functions of intervertebral discs in the mammalian skeleton.
(Solved)
State two functions of intervertebral discs in the mammalian skeleton.
Date posted:
May 26, 2017
.
Answers (1)
-
The diagram below represents a mammalian pelvic girdle.
(Solved)
The diagram below represents a mammalian pelvic girdle.
(a) State the function of obturator foramen.
(b)(i) Name the bone that articulates with the pelvic girdle at acetabulum.
(ii) Name the type of joint formed by the acetabulum and the bone named in (c) above
(c) Name a bone formed by the fusion of caudal vertebrae in human beings.
Date posted:
May 26, 2017
.
Answers (1)
-
State two functions of pelvic girdle in mammals.
(Solved)
State two functions of pelvic girdle in mammals.
Date posted:
May 26, 2017
.
Answers (1)
-
(a) State two features of a ball and socket joint.
(b) Name the bone that allows the head to: (i) node; (ii) turn side ways
(Solved)
(a) State two features of a ball and socket joint.
(b) Name the bone that allows the head to: (i) node; (ii) turn side ways
Date posted:
May 26, 2017
.
Answers (1)
-
The diagram below illustrates the arrangement of bones and muscles in the human arm.
(Solved)
The diagram below illustrates the arrangement of bones and muscles in the human arm.
(i) Name the bones labelled K and L.
(ii) Explain how the upwards movement of the lower arm is brought about by the bones and muscles shown in the diagram above.
Date posted:
May 26, 2017
.
Answers (1)
-
The diagram below represents features of a joint in a mammal.
(Solved)
The diagram below represents features of a joint in a mammal.
(a) Name the part labelled A.
(b) State the function of the part labelled B.
Date posted:
May 26, 2017
.
Answers (1)
-
The diagram below represents part of the human skeleton.
(Solved)
The diagram below represents part of the human skeleton.
(a) Name the part labeled P.
(b) (i) Name the bone that articulates with the part labeled Q.
(ii) What type of joint is formed between the part labeled Q and the bone named in (b)(i) above?
Date posted:
May 26, 2017
.
Answers (1)
-
Give three functions of pectoral and pelvic fins fins in a fish.
(Solved)
Give three functions of pectoral and pelvic fins fins in a fish.
Date posted:
May 26, 2017
.
Answers (1)
-
The diagram below represents a bone obtained from a mammal.
(Solved)
The diagram below represents a bone obtained from a mammal.
(a) Name the bone
(b) Name the: (i) Bone which articulate with the bone named (a) above at the cavity labeled K.
(ii) Joint formed by the two bones.
(c) State the function of the part labeled J.
Date posted:
May 25, 2017
.
Answers (1)
-
Why is movement necessary in animals?
(Solved)
Why is movement necessary in animals?
Date posted:
May 25, 2017
.
Answers (1)
-
The diagram below represents a tissue obtained from an animal
(Solved)
The diagram below represents a tissue obtained from an animal
(a) Identify the tissue.
(b) State the functions of the tissue named in (a) above
Date posted:
May 25, 2017
.
Answers (1)
-
State two advantages of having an exoskeleton.
(Solved)
State two advantages of having an exoskeleton.
Date posted:
May 25, 2017
.
Answers (1)
-
State the functions of synovial fluid.
(Solved)
State the functions of synovial fluid.
Date posted:
May 25, 2017
.
Answers (1)
-
State the difference between ball and socket and hinge joint
(Solved)
State the difference between ball and socket and hinge joint
Date posted:
May 25, 2017
.
Answers (1)