Sagittal section cutting down the middle of body

Sagittal section- Cutting down the middle of body/ parallel to long body of
Frontal Section-Longitudinal plane that divides ventral and dorsal
Transverse section- x.s or Cross section

Thoracic cavity- Region most
cranial of coelom. Separated
from caudal by diaphragmn
Coelom- contains digestive tract and
other internal orgs.
Formed between layers of mesoderm
Abdominal- Most caudal.
Opposite of Thoracic
Pleural cavities-
Lungs
Pericardial- heart

Cerebellum-
the part of the brain at the back of the skull in vertebrates. Its function
is to coordinate and regulate muscular activity.
Cerebral Hemisphere-
each of the two parts of the cerebrum (left and right) in the
brain of a vertebrate.
Liver- liver detoxifies chemicals and metabolizes drugs. As it does so, the
liver secretes bile that ends up back in the intestines. The liver also makes
proteins important for blood clotting and other functions.
Trachea- Anterior -
a large membranous tube reinforced by rings of cartilage,
extending from the larynx to the bronchial tubes and conveying air to and from the
lungs; the windpipe.

Spleen-
an abdominal organ involved in the production and removal of blood cells in
most vertebrates and forming part of the immune system.
Cecum-
a pouch connected to the junction of the small and large intestines breaks
down cellulose, ingest feces for copography
Stomach-
the internal organ in which the major part of the digestion of food occurs,
being (in humans and many mammals) a pear-shaped enlargement of the
alimentary canal linking the esophagus to the small intestine.
Kidney- The kidneys are two bean-shaped organs, each about the size of a
fist. They are located just below the rib cage, one on each side of the spine.
Everyday, the two kidneys filter about 120 to 150 quarts of blood to
produce about 1 to 2 quarts of urine, composed of wastes and extra fluid
Abdominal Aorta- abdominal aorta is the largest artery in the abdomen
that provides blood to the organs and tissues of the abdomen , pelvis, and
legs. It descends from the thorax as a continuation of the thoracic aorta and
branches several times to form the major arteries of the abdomen .
Urinary bladder- Collects urine that is excreted and filtered by kidneys
Uterus-
the organ in the lower body of a woman or female mammal where offspring
are conceived and in which they gestate before birth; the womb.
Fallopian Tubes-
in a female mammal) either of a pair of tubes along which eggs
travel from the ovaries to the uterus.
Ovary- Posterior, Produces eggs for reproduction
Arteries- Stained with red dye
Veins- stained with blue dye
Lab 7: Animal Development
Biologist use model organisms to study
development.
Sea urchin (Echinodermata)
External fertilization
2 haploid gametes= diploid zygotes
Form fertilization membrane- block
polyspermy, Outermost ring

● Embryos and Development
-cells formed from the division (cleavage) of the zygote differentiate
❏ Sea Urchin
-embryo is transparent
-graze on algae
-male and female shed gametes into open sea (fertilization
external)
● Major stages in animal embryonic development
1. F