(a) Hair.
(b) A diaphragm.
(c) Only one aortic arch, and that on the left side of the body.
(d) Its young born alive. (But two very reptile-like mammals of Australia, the duck-billed platypus and the echidna, lay eggs, and certain fish and reptiles bear living young.)
(e) Epiphyses to its vertebral -centre- [centra].*
(f) The cerebral hemispheres covering the mid-brain.
(g) Corpora quadrigemina instead of bigemina.
[(h) A corpus callosum.]
[(i) A spirally coiled cochlea to the internal ear.]
[(In respect to h and i also, the echidna and platypus are scarcely mammalian.)]
* But certain mammals have no such epiphyses.
Section 149. The rabbit, together with the hares and conies, rats and mice, voles, squirrels, beavers, cavies, guineapigs is included in that order of the class of mammals which is called the rodentia, and is distinguished by the character of the incisor teeth from other orders of the class.
10. _Questions and Exercises_
- Describe the venous circulation of the rabbit (with diagrams).
Compare a vein and artery. Compare the distribution of the great
venous trunks with that of the arterial system.
- Construct a general diagram of the circulation of the rabbit, to show
especially the relation of the portal system, the lymphatics and
lacteals, and the renal circulation to the main blood current.
- Draw the alimentary canal of the rabbit from memory.
- What is a villus? Describe its epithelium, and the vessels within it.
Write as explicit an account as you can of the absorbent action of a
villus.
- Tabulate the alimentary secretions, and their action on the food.
- What is botryoidal tissue? Where does it occur? What is known
of its functions?
- Copy Diagram I. (enlarged), and insert upon it the visceral nerves
as far as you can.
- What are the most characteristic points in the mammalian vertebral
column?
- Describe cartilage and bone, and compare them with one another.
- Give an account of the amoeba, and compare it with a typical
tissue cell in a metazoon (e.g., the rabbit).
- Give a general account of connective tissue. What is tendon?
- Trace, briefly, the increased modification of tissues in the
vertebrata.
- Describe, with diagrams, the structure of blood. State the function
of each factor you describe.
- Compare the pectoral with the pelvic limb and girdle. What other
structures of the adult rabbit display a similar repetition of similar
parts?
- Draw from memory typical vertebrae from each region of the
vertebral column.
- What are bilateral symmetry and metameric segmentation?
- Give a schedule of distinctive mammalian features.
- Describe the rabbit's brain (with diagrams).
- Give a list of the cranial nerves of the rabbit, and note their origin
in the brain.
- Give a list of the nerve apertures of the dog's skull.
- What are the chief anatomical differences between a typical
cranial, a spinal, and a sympathetic nerve?
- Describe and figure the distribution of nerves V., VII., IX., and X.
- Describe the muscles, glands, and nerves of the orbit of the
rabbit.
- Describe, with figures, the eye of the rabbit.
- Give a diagram of the rabbit's internal ear.
- Draw and describe the ear ossicles. What is their function?
- Draw and state the precise position of the hyoid bone, the
clavicle, the calcaneum, and the olecranon process.
- Describe, as accurately as possible, the position of palatine
bones, pterygoids, the ethmoid bone, the pre- and basi-sphenoids,
in the dog's skull.
- What is membrane bone? What is cartilage bone? Discuss their
mutual relationship.
- What is an excretion? What are the chief excretory products of an
animal? How are they removed?
- Describe the minute anatomy of the liver. Give a general account
of its functions.
- Describe the minute anatomy of the kidney, and the functions of
the several parts.
- What is ciliated epithelium? Where does it occur in the rabbit?
- Describe the mechanism of respiration. What is the relation of
respiration to the general life of the animal?
- What are the functions of the skin? Describe its structure.
- What is a secretion? Tabulate and classify secretary organs.
What is a goblet cell?
- Draw, from memory, the dorsal and ventral aspects of, and a
median section through, a dog's skull.
- Name any structures that appear to you to be vestiges or
rudiments, i.e., structures without adequate physiological reason, in
the rabbit's anatomy.
- How are such structures interpreted?
- Describe the structure of striated muscular fibre. Describe its
functions, and the various means by which they may be called into
activity.
- Describe the characters and structure of the blood of the rabbit.
What is the lymphatic system? Describe its relation to the blood
system in a mammal.
- Describe the structure of (a) blood, (b) hyaline cartilage, (c)
bone, in the rabbit; (d) point out the most important resemblances and
differences between these tissues; (e) state what you know of the
development of the same tissues.
- Draw diagrams, with the parts named, of the male and female
generative organs of the rabbit.
- In the rabbit provided dissect on one side and demonstrate by
means of flag-labels the main trunk of the vagus nerve, the phrenic
nerve, and the recurrent laryngeal nerve.
- Dissect the rabbit provided so as to expose the abdominal viscera. Mark with flag-labels the duct of the pancreas, the ureters, and the oviducts or the sperm ducts (as the case may be).
[Many of the above questions were actually set at London University Examinations in Biology.] {In Both Editions.}