___ is the control of tissue water balance , and the elimination of excess salts and urea, a waste product of the metabolism of amino acids.
Blood enters the kidney through the ___ artery and exits through the ___ vein.
The ____ lines the abdominal cavity.
Bowman's capsule, a cup-shaped swelling at the end of the nephron, surrounds the ball of capillaries, the ____.
proximal and distal convoluted tubules and associated blood vessels lie in the ____.
A ____ consists of Bowman's capsule, a proximal convoluted tubule, the loop of Henle, a distal convoluted tubule, and a collecting duct.
____ ____ cells line most regions of the nephron.
In the fetal pig, the urinary bladder is located between the two ___
The urinary bladder narrows into the small ____
The ____ exits the urinary bladder near the attachment of the ureters.
the urethra joins the vagina, forming a chamber called the ____.
sperm pass from the testes into the ____, where they mature and are stored. It originates at the cranial end of the testis.
When ejaculation takes place, sperm passes from the epididymis through the ____.
The urogenital opening is the ___.
the ____ leads to the scrotum.
The ____ is a bean shaped gonad.
The two large ____ lie on either side of the urethra anterior to its junction with the penis.
The ___ are a pair of glands that lie on the dorsal surface of the urethra near the junction of the ductus deferens and the urethra.
The ___ lies between the lobes of the seminal vesicles.
The ___ are caudal to the kidneys in the abdominal cavity.
A small convoluted tube, the ____, can be observed at the border of the ovary.
The body of the uterus lies __ to the urethra.
The ___ is the functional cell of the nervous tissue
cell body, dendrites, axon
The three parts of a neuron are: ___, ___, and ___.
____ are extensions from the cell body that transmit nervous impulses toward the cell body.
The ___ is an extension that transmits nervous impulses away from the cell body to the next neuron or sometimes to a muscle fiber.
____ are nonconducting cells that support and protect neurons.
the two roots found in the spinal cord are the ___ and the ___. These roots are collections of processes of neurons in spinal nerves.
The small channel in the center of the spinal cord is the ___.
In the spinal cord, white matter lies ___ of the gray butterfly shaped matter.
dorsal root ganglion
cell bodies of sensory neurons lie in the _____.
___ lie between sensory and motor neurons.
The ___ is a tough, transparent layer that allows light to enter the eye.
Sensory neurons exit the retina as fiber of the ___.
the ___ is the outer layer of the eyeball.
The ___ is the posterior portion of the fibrous tunic.
a hard, oval shaped structure in the eye.
The ___ is a dark, ridged, muscular structure surrounding and attached to the lens by thin ligaments.
the ciliary body is a component of the second tunic of the eye, the darkly pigmented ____.
The ___ surrounds the pupil.
The ____ allows light to pass through the vascular tunic to the lens. The iris is a sphincter muscle
The delicate ___ is the third tunic of the eye. It contains millions of microscopic rods and cones.
The ___ absorbs extraneous light rays passing through the retina.
the ___ is a tissue found in the choroid of some animals that enhances vision in limited light.
___ occurs when cells, tissues, and organs become specialized for a particular function.
____ is the development of the animal's shape, body form, and organization.
___ is form. It is used to describe the process of development.
____ have become important subjects for developmental studies.
____ is the production of gametes
___ is the formation of three primary germ layers--ectoderm, mesoderm, and endoderm.
____ is the formation of the nervous system in chordates
___ is the development of organs from the three primary germ layers.
The cells of the blastula are called ____.
The zygote is converted to a multicellular ball or disc called the ___.
The ___, a cavity, forms within the ball of cells.
eggs with small amounts of evenly distributed yolk are called ___ eggs.
eggs with large amounts of york concentrated at one end are called ____ eggs.
eggs may also be classified as ____, with the yolk in the center of the egg. OR ___ with no significant yolk reserves.
THe nuclear-cytoplasmic region is the ____. It is displaced toward the pole of the egg where the polar bodies budded from the cell in meiosis.
___ is the pole where polar bodies budded from the cell in meiosis. The blastodisc is displaced here.
The ____ is the opposite of the animal pole
In ___ cleavage, cell divisions pass through the entire fertilized egg.
In ___ cleavage, only the active cytoplasm is divided during cleavage.
In meroblastic cleavage, a cap of cells called the ___ is produced.
surface cells migrate into the interior of the embryo in a process called ____.
The involuted cells form a new internal cavity, the ___, lined by the ____, the embryonic germ layer that ultimately forms the digestive tract.
In deuterostomes, this becomes the anus.
The cells that remain on the surface of the embryo become the ____.
In chordates, certain ectodermal cells flatten into an elongated ____ extending from the dorsal edge of the blastopore to the anterior end of the embryo.
cleavage, gastrulation, neurulation, organogenesis
Name the four steps in embryonic development.