Histamines are chemicals that your body makes up to help get rid of something that’s bothering you. in relation to allergies, histamines help you get rid of by coughing, sneezing, itching, etc.
Answer:
free from dirt, marks, or stains.
Explanation:
Abnormal sperm production or function due to undescended testicles, genetic defects, health problems such as diabetes or infections such as chlamydia, gonorrhea, mumps or HIV. Enlarged veins in the testes can<span> also affect the quality of sperm</span>
Oxygen and Carbon Dioxide
A placenta would the answer because that is whats used during pregnancy. please mark brainiest answer XD