What substances would you find in the blood vessels leading away from small intestine towards liver?

1. Nutrients:

- Glucose: Absorbed from carbohydrates.

- Fatty acids: Absorbed from fats.

- Amino acids: Absorbed from proteins.

- Vitamins: Absorbed from food sources.

- Minerals: Absorbed from food sources.

2. Water:

- Absorbed from digested food and beverages.

3. Electrolytes:

- Sodium (Na+)

- Potassium (K+)

- Chloride (Cl-)

- Bicarbonate (HCO3-)

4. Lipoproteins:

- Transport fats, cholesterol, and phospholipids.

- Types:

- Chylomicrons: Carry dietary fats from the intestine to other tissues.

- Very low-density lipoproteins (VLDL): Transport triglycerides from the liver to adipose tissue.

- Low-density lipoproteins (LDL): Transport cholesterol to peripheral tissues.

- High-density lipoproteins (HDL): Transport cholesterol from peripheral tissues back to the liver.

5. Blood gases:

- Oxygen (O2)

- Carbon dioxide (CO2)

6. Waste products:

- Urea: Result of protein metabolism.

- Creatinine: Result of muscle metabolism.

- Uric acid: Result of purine metabolism.

- Bilirubin: Breakdown product of hemoglobin.

Note: In the context of hepatic portal circulation, these substances are carried in the hepatic portal vein from the gastrointestinal tract and spleen to the liver. The liver processes and metabolizes these substances before they enter the systemic circulation.