It is useful for an ecologist to identify the keystone species in an ecosystem because the keystone species is important to maintaining the stability of an ecosystem, and any changes in the keystone species population shows that there is changes in ecosystem health.
F= aorta
d=Left atrium]
c= inter-ventricular septum
There are 206 bones in the human body.
Isotopes
Atoms of the same element; number of protons remain the same, number of neutrons vary. Chemical properties remain the same. Atomic mass varies.
Na sodium with 11 neutrons = atomic mass of 22
With 22 neutrons the mass is 23.
Both have 11 protons in the nucleus.
Answer:
Visceral motor
Explanation:
Peripheral nervous system is divided further into visceral and somatic nervous system. Somatic nervous system controls the skeletal muscles, joints and tendons. Visceral nervous system controls cardiac muscles, glands and smooth muscles.
Large intestine has smooth muscles so it is controlled by the visceral nervous system. It has further two divisions, sensory and motor. Sensory division carries signals from the muscle to the central nervous system whereas motor division carries signals from the central nervous system to the muscle which cause an action. Hence, visceral motor division carries signals to the smooth muscle in the large intestine.
