space between the presynaptic and postsynaptic membranes

chemical signal (neurotransmitter) that travels between nerve cells

spherical structure that contains a neurotransmitter

protein lattice that forms between homologous chromosomes during prophase I, supporting crossover

joint that is immovable

bones joined by hyaline cartilage; synchondroses are found in the epiphyseal plates of growing bones in children

joint in which the bones are connected by a band of connective tissue, allowing for more movement than in a suture

type of cell found in the ovule sac that secretes chemicals to guide the pollen tube towards the egg

only joint that has a space between the adjoining bones

flow of blood away from the heart to the brain, liver, kidneys, stomach, and other organs, the limbs, and the muscles of the body, and then the return of this blood to the heart

study of whole biological systems (genomes and proteomes) based on interactions within the system

contraction phase of cardiac cycle when the ventricles are pumping blood into the arteries