Answer:
B
Explanation:
Oxygenated blood enters the left atrium
B. Skeleton Hope This Helped
I believe the answer would be d.muscle cramps. Breathing in toxins seems like it could relate to the other three answers.
The periodontium is the specialized tissues that both surround and support the teeth, maintaining them in the maxillary and mandibular bones. The word comes from the Greek terms περί peri-, meaning "around" and -odont, meaning "tooth". ... Alveolar bone proper. The answer is C
