The species theory, polygenism, held that human races were of different lineages and suggested a hierarchy outlined in the Chain of Being that positioned Africans between man and lower primates.
No, they are involved in the Circulatory System which is responsible for pumping and channelling blood to and from the body and lungs with heart, blood and blood vessels. no veins are not considered an organ because they are a grouping of different tissues like a organ.
True. False. Most of the organs of the human body are found in the posterior cavity, which is divided into the thoracic and abdominal regions. True. False. Both bone and blood are types of connective tissue. True. False. Goblet cells are located in columnar epithelium and secrete mucus.alse. Epithelial tissue covers or lines body surfaces or cavities. True. False. Injuries to cartilage generally heal quickly because of the rich blood supply to this tissue. True. False. Organs are groups of specialized cells that are similar in structure and perform common functions.