If a clinician wants to collect blood samples from a patient in order to evaluate the efficiency of gas exchange in the lungs the clinician would perform which of the following procedures? Transfusion
Arterial puncture
Venipuncture
Lumbar puncture
Erythrocentosis

human-caused climate hope this

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

i think its both a and b