Fill in each blank with the correct word from the lesson.

1. The skin excretes water, salts, and small amounts of _______ through sweat.
2. It is eventually collected by a parallel network of _______atic vessels and returned to the bloodstream.
3. Alongside the lymphatic system, the body has _______ organs that remove the metabolic waste products produced by cellular activities.
4. Fluid constantly leaks from blood capillaries into the spaces between cells, bathing them with nutrients and _______.
5. The lungs excrete _______ and water vapour with every breath.

Choose the best option for each question.

1. What is lymph?
   a) A type of blood cellb) Fluid that leaks from capillaries and bathes body cellsc) A hormone produced by kidneysd) Digestive juice
2. What is the main waste product removed by the kidneys?
   a) Carbon dioxideb) Oxygenc) Uread) Glucose
3. Why do lymph nodes swell during an infection?
   a) They fill with bloodb) They grow larger permanentlyc) They are actively filtering pathogens and producing immune cellsd) They absorb extra water

Write T for True or F for False in the brackets.

1. Fluid that leaks from capillaries and bathes body cells is one of the key concepts in the lesson on Lymph and Excretion.
2. A type of blood cell is the main topic of this lesson.
3. The skin excretes water, salts, and small amounts of urea through sweat.
4. The skin excretes water, salts, and small amounts of Carbon dioxide through sweat.

1. In your own words, explain what Lymph and Excretion means.
2. List two things you learned from this lesson on Lymph and Excretion.