Answer:
The “lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.
Answer:
Hola! my name is Marissa and i am here to help!:)
the answer to your question is periosteum!
Explanation:
the periosteum is the membrane that surrounds the bone (when the bone shatters this layers can help prevent the shards going elsewhere)
brainliest?
Answer:
OBJECTIVES:
To observe symptoms and signs of representative diseases caused by the Oomycete pathogens.
To become familiar with vegetative and reproductive structures of the Oomycetes, and their role in disease development.
INTRODUCTION:
The Oomycetes, also known as water molds, are a large group of terrestrial and aquatic eukaryotic organisms. Although they superficially resemble fungi in mycelial growth and mode of nutrition, molecular studies and distinct morphological characteristics place them in the kingdom Chromalveolata (phylum Heterokontophyta, the 'stramenopiles') with brown and golden algae and diatoms.
Explanation: