Carbon Dioxide and wastes are transferred for oxygen. The  blood then travels to the left atrium by the pulmonary artery and  then to the left ventricle. The blood leaves the heart by the aorta  to the other parts of the body.. The circulatory system is the organ system that carries substances around our body. There is no such thing as a circulary system.
Overview [edit]. The purpose of the ribosome is to translate messenger RNA (mRNA) to proteins with the aid of tRNA. In eukaryotes, ribosomes can commonly be found in the cytosol of a cell, the endoplasmic reticulum or mRNA, as well as the matrix of the mitochondria.
Ribosomes. 1  Ribosomes are the site for protein synthesis of the cell. 2  It is composed of two subunits, a small subunit and a large subunit. 3  The ribosomes subunits acts as an assembly line where the RNA from the nucleus is used to synthesize proteins from amino acids.rganelles like the nucleus and golgi apparatus are usually single while others like mitochondria, chloroplasts, peroxisomes and lysosomes are in large numbers about hundreds to thousands. The cellular organelles are suspended and surrounded in a gelatinous fluid cytosol that fills the cell.