Answer:
The dura mater and pleural contain fluid which lubricates the brain and lungs respectively.
Explanation:
Dura mater is the outermost layer and a sac in the brain that envelope arachinoid and it's surrond venous channels which carried blood from the brain to the heart. The dura mater contain cerebrospinal fluid and drains it from the brain to the internal jugular vein
The pleural help in the proper functioning of the lungs and it supply pleural fluid which lubricates the lungs and allow for respiration.
Sorry b, gonna need to know that the observations are.
The smallest unit of classification is species.
Answer:
Dichotomous key consist of series of choice associated with questions one after the other which helps in identifying an organism
Explanation:
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Answer: Aorta
Explanation: The aorta is the largest artery in the body. It carries oxygenated blood from the left ventricle of the heart into systemic circulation. The aorta has many subdivisions that branch off into smaller arteries.
