In pines, the female gametophyte contains , each of which contains a(n) . In pines, the female gametophyte contains , each of which contains a(n) . aronia ... egg antheridia ... sperm cell microsporangia ... egg cell antheridia ... egg aronia ... sperm cell

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

feral cats are estimated to eat tens of millions of native animals each night in australia

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.