Blood leaving liver and moving to the heart has usually high concentration of

Options

A. Bile
B. Glycogen
C. Amino acids
D. Urea

Answer

To solve the question "Blood leaving liver and moving to the heart has usually high concentration of," we will analyze the options provided and understand the metabolic processes occurring in the liver.

### Step-by-Step Solution:

1. **Understanding Blood Flow from the Liver**:
- Blood from the liver is rich in various metabolites and waste products. The liver plays a crucial role in processing nutrients and detoxifying substances.

2. **Analyzing the Options**:
- **Option A: Bile** - Bile is produced by the liver but is not transported in the blood. It is secreted into the bile ducts and stored in the gallbladder.
- **Option B: Glycogen** - Glycogen is stored in the liver but is not present in high concentrations in the blood. Instead, glucose is released into the bloodstream when glycogen is broken down.
- **Option C: Amino Acids** - While amino acids are present in the blood after protein digestion, they are not the primary waste product of protein metabolism.
- **Option D: Urea** - Urea is the end product of protein metabolism in the liver. The liver converts excess amino acids into urea, which is then released into the bloodstream.

3. **Conclusion**:
- After analyzing the options, the correct answer is **Option D: Urea**. Blood leaving the liver has a high concentration of urea due to the liver's role in metabolizing proteins and converting ammonia to urea for excretion.

### Final Answer:
Blood leaving the liver and moving to the heart has usually a high concentration of **urea**.

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