NEED HELP ASAP. Match each organ with the correct organ system.

1.stomach
2.brain
3.heart
4.kidneys
5.bone marrow
6.pituitary gland
7.xylem
8.bones
9.fallopian tubes
reproductive system
nervous system
skeletal system
excretory system
vascular tissue system
endocrine system
digestive system
lymph system cardiovascular system

1. Stomach, Digestive System

2. Brain, Nervous System

3. Heart, Circulatory System

4. Kidneys, Excretory System

5. Bone marrow, lymphatic system

6. Pituitary Gland, Endocrine System

7. Xylem, Vascular Tissue System

8. Bones, Skeletal System

9. Fallopian tubes, reproductive system

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: