The negative pole or electrode - i. e., the pole by which the electric current leaves.
The substance of which vegetable cell walls are formed.
Primitive swellings on the primary neural tube of the early embryo which develop into the brain.
Substances which cannot be split up into components, and therefore are regarded as simple.
The green coloring matter of the cells of plants. It is supposed to be the agent which, under the influence of light, decomposes carbon dioxide and water to form the cellulose and starch of the plant.
The precursor of the vertebral column of the embryo.
The outer layer of the membranes of the ovum, part of which becomes vascular, and helps to form the placenta.
The vascular coat of the eyeball.
The alteration of white light into prismatic colors during its passage through an ordinary lens.
The fluid absorbed from the small intestines by the lacteals.
The fluid absorbed by gastric digestion.
Minute vibratile processes which occur on the surface cells of the respiratory and many other epithelial membranes.
Large papillae situated at the back of the tongue. They are surrounded by a fossa in the walls of which lie taste buds.
The opening common to the genko-urinary organs in the primitive hind gut of the embryo. The cloaca persists in birds.
That condition of quasi-dissolved matter in which it will not diffuse through a membrane such as parchment. The opposite of crystalloid.
The first milk secreted alter delivery.
The adjustment of separate actions for a definite result, as when the nerve centres cause various distinct muscles to act together and produce complex movements.
A poison causing motor paralysis by impairing the function of the nerve terminals.
A living protoplasmic unit which has no nucleus.
The outgrowth of the uterine mucous membrane which surrounds the ovum.
That part of the modified mucous membrane of the uterus in which the fecundated ovum is lodged.
The altered mucous membrane of the uterus, which lines that organ during gestation.
The act of swallowing.
The term used to denote the casting off of the outer layer of the skin.
The diffusion of soluble crystalloid substances through membranes, such as parchment.
The period of relaxation and rest of the heart's muscle.
The double wave of the arterial pulse. The dicrotic wave is seen on the descending part of the pulse curve.
Transparent bodies, such as those parts of the eye which so refract the light that images come to a focus on the retina.
Part of the granular layer of the Graafian follicle surrounding the ovum.
A term used to denote a part relatively far from the centre.
A short bond of union between the pulmonary artery and the aorta, which in the foetus carries blood from the right side of the heart into the aorta.
A vessel which, in the foetus, carries blood from the umbilical vein to the vena cava. After birth it becomes a fibrous cord.
The union between the yolk sac and the intestine of the embryo.
Difficulty in breathing; a condition in which inordinate respiratory movements are excited by an unusually venous state of the blood in the respiratory nerve centre.
The outer layer of simple organisms.
The outer layer or covering of certain unicellular organisms.
The terminals which are applied to a substance in order to complete the circuit in passing a current through it.
A peculiar electric state of nerves resulting from the passage of a continuous current through them.
The name given to the animal at the earliest period of its development.
A term applied to the normal eye, in which parallel rays of light are brought to a focus at the retina without accommodation.
The suspension of very fine particles in a liquid unable to dissolve them.
The inner layer of simple organisms.
The formation of new cells or organisms within the body of the parent individual.
The liquid contained within the membranous labyrinth of the ear.
The inner layer of certain unicellular organisms.
The diffusion of a fluid into a texture.
The single layer of thin cells lining the serous cavities, lymphatic and blood-vessels, and all spaces in the connective tissues (meso-blastic lining cells).
The uppermost of the three layers of the blastoderm, from which are developed the epidermis and the nerve centres.
The non-vascular cellular tissue developed from the epi- and hypoblast of the blastoderm.
A term used to denote the normal rhythm of respiratory movements in contradistinction to dyspnoea and apncea.