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Darwin Hudson ∙
Organs are made up of several tissues that work together to form structures which carry out the same job.
carries oxygen rich blood from the lungs to the heart
Red blood cells coagulate wounds; white blood cells defend against bacteria.
Which of these organisms is considered the most complex?
A group of organs
Red and white blood cells are formed in the bone marrow, so disorders of the marrow can cause blood disorders.
pituitary gland controls to produce some hormones
The blood returns to the heart through veins.
You would be more likely to be harmed by common viruses
Apex is Mergus serrator and Mergus merganser.