Where is the site where we would find the majority of the nephron loops?

Medulla and renal pyramid

Explanation:

The urinary system is comprised of the kidney, ureter, urinary bladder, and urethra. The kidney produces urine, which contains excess water, electrolytes and waste products of the body. It then flows down the ureter into the bladder where it is temporarily stored. The bladder is then emptied via the urethra.

renal pyramid

Explanation:

The loops of all nephrons travel into the medulla and renal pyramids where urine is concentrated.

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.